Best Slot Sites UK to Play Online in 2025
By Marta Cutajar - Friday 27th June 2025 12:32 PM
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Identifying the best slots sites in the UK isn’t easy. Slots are probably the most popular games around, so every casino worth its salt will offer plenty of them. While that makes it tricky, if not impossible, to pick just one slot site to rule them all, we have been able to come up with a shortlist of the strongest contenders, as you can see below:
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Breakdown of the Top UK Slots Sites
Now we are going to get to know the best slots sites in the UK a little better. We’ve selected seven top online casinos where you can play hundreds, if not thousands, of the top video slots. Pick any of these casino sites to be instantly transported to slotting heaven.
1. Best Overall Slot Site – 21LuckyBet
Leading the pack for our top UK slots sites, we have 21LuckyBet. We had no choice, really, as this is the number one ProgressPlay site, and ProgressPlay sites are renowned for their top slotting library packed with all the best titles from the leading providers. You start off right at 21LuckyBet too, with the casino giving you free spins once you’ve made your initial deposit at the site – ideal for a bit of site testing! As well as being our top choice for a slots site, we reckon 21LuckyBet is ideally suited for all manner of casino game players, with exciting bonuses and easy ways to get money in and out of your account.
| 21LuckyBet Casino – Key Features | |
|---|---|
| Launched: | 2022 |
| Owner: | ProgressPlay Limited |
| Licence: | UKGC, MGA |
| Welcome Bonus: | 100% up to £200 + free spins |
| Number of Slots: | 1,800+ |
| Slots Types: | Video, Classic, Megaways, Progressive |
This leading UK slots site marries all the latest slots to hit the casino realm with all your favourite classics. It’s impossible to count all the slots available, but there’s certainly enough to keep you entertained for weeks, if not years! Pragmatic Play leads the charge, so there are all the slots available in their amazing ‘Big Bass’ series of feature-rich slots. Eyecon is on board too, so if you like cuddly critters, then Fluffy Favourites is the slot for you. 21LuckyBet really is a casino paradise for any enthusiastic slots player.
2. Top Site for Progressive Slots – Ladbrokes Casino
We should hardly need to introduce Ladbrokes to you, unless you’ve just landed on the shores of the UK for the first time and have never gambled a penny in your life. This grand old name in the UK gambling scene has been around for well over one hundred years, primarily as a bookmaker but also as a provider of casino games since the 2010s. There’s plenty to love about Ladbrokes and its casino, but we love it the most because it’s the best slots site in the UK for progressive jackpot slots.
| Ladbrokes Casino – Key Features | |
|---|---|
| Launched: | 1886 (real world), 2000 (online) |
| Owner: | Entain |
| Licence: | UKGC |
| Welcome Bonus: | Bet £10, Get £30 |
| Number of Slots: | 1,800+ |
| Slots Types: | Video, Classic, Megaways, Progressive |
The biggest jackpot available is the Jackpot King jackpot, which, at the time of writing, stood at over £2 million. There are a large number of slots currently contributing to the Jackpot King progressive jackpot, including The Goonies Megaways, Eye of Horus: The Golden Tablet, and Ted. Jackpot Blitz is another series of jackpot slots, and while the jackpot never breaches a million, you’ve a much better chance of actually landing it. Rapid Fire progressive jackpot slots are available here too, such as Cash Strike Hotstepper and King Kong Cash: Even Bigger Bananas.
3. Player Favourite for Megaways Slots – Casumo Casino
If you’re familiar with the amazing Casumo Casino but you haven’t paid it a visit for a year or two, then you might be in for a bit of a shock! Casumo changed hands in 2024 and was snapped up by Recro Limited. Recro has given Casumo a tidy makeover and made this thrilling casino site even better than ever. It really scores highly in every category, but for slots, it’s exceptional and especially for fans of Real Time Gaming’s Megaways dynamics. Megaways always maxes out the number of winning paylines on a slot, up to a maximum of 117,649!
| Casumo Casino – Key Features | |
|---|---|
| Launched: | 2012 |
| Owner: | Recro Limited |
| Licence: | UKGC |
| Welcome Bonus: | 100% up to £100 + 50 bonus spins |
| Number of Slots: | 3,500+ |
| Slot Types: | Video, Classic, Progressive, Megaways, Slingo |
We got out our Megaways abacus to calculate just how many Megaways slots there are available at this, one of the best UK slot sites, and the total came to a stonking number that’s just a tad under 200! We never knew there were so many Megaways slots, and we think that Casumo has them all. The list begins with 10,001 Nights Megaways and ends with Zillard King Megaways, and there’s everything in between. Play the latest Megaways slots plus classics such as Bonanza, Rick & Morty and Dazzle Me, all at the Casumo casino!
4. Standout for Slot Bonuses – Paddy Power Casino
All online slots players love free spins, and the Paddy Power casino loves slots players. You get a free spin of the Paddy Power Wonder Wheel at this site every single day. Just spin to see what you can win – free spins, cash bonuses, free bets and free scratchcards. Every day, there is a chance of winning something to your advantage, and for absolutely free! There are plenty of top slots to use your free spins on at the Paddy Power casino too, including Cash Goddess, Buffalo Blitz Cash Collect, and any one of the 1,000 or so Big Bass slots Pragmatic Play keep churning out.
| Paddy Power Casino – Key Features | |
|---|---|
| Launched: | 1998 (real world), 2004 (online) |
| Owner: | Flutter Entertainment |
| Licence: | UKGC |
| Welcome Bonus: | 60 free spins + 100 free spins for a £10 deposit |
| Number of Slots: | 600+ |
| Slot types: | Video, Classic, Progressive, Megaways, Exclusives |
You get a choice of welcome bonuses at the Paddy Power casino too. You can plump for 60 free spins (50 on any slot, 10 on Paddy’s Mansion Heist) when you sign up, followed by another 100 free spins when you deposit and wager £10. The alternative is a 25 free spins welcome bonus (all on Paddy’s Mansion Heist) plus another 25 free spins (also on Paddy’s Mansion Heist) for a £10 deposit. You can also win free spins and other slots rewards every week via Paddy’s Rewards Club – you just need to wager a minimum of £10 to grab your freebies!
5. Best for Feature-Rich Slots – HighBet Casino
HighBet qualifies as a relatively new UK slots site, having popped out of the casino realm womb in 2021. Like many online casinos, it’s a bit of an all-rounder and caters for much more than slots fans, with live casino games and crash games the most noteworthy. However, we are here to talk about slots, and if you love games that are rich in unique features, HighBet Casino is the slots site where you will be most rewarded. It features titles from three developers that are particularly famous for their inventive game dynamics – NetEnt, Play’n GO and Pragmatic Play.
| HighBet Casino – Key Features | |
|---|---|
| Launched: | 2021 |
| Owner: | SCGO Limited |
| Licence: | UKGC |
| Welcome Bonus: | 50 Free Spins on Big Bass Splash |
| Number of Slots: | 2,200+ |
| Slot Types: | Video, Progressive, Megaways, Slingo |
NetEnt’s fantastic Starburst is available at the HighBet casino, complete with expanding wilds and the ‘both ways pay’ feature. Pragmatic Play’s immensely popular Dog House slot can be played here too, with its high volatility and rewarding RTP of 96.5%, plus those thrilling x2 and x3 multipliers that can fall onto the reels at any time. The classic Rich Wilde & the Book of Dead is also available here. It’s a real treat to play, as are the follow-ups Tome of Dead and Tome of Insanity – all absolute slotting crackers!
6. Most UK Slot Tournaments – JeffBet
If you are a seriously keen slots player, then slots tournaments may just be the thing for you. At JeffBet – another fantastic Progress Play casino – you can compete against your fellow slotting enthusiasts to earn a place atop the slotting leaderboard. There are slots tournaments running all the time, and JeffBet often has daily, weekly and monthly tournaments all running consecutively. Remember, though, that you need to be sensible with your spending when playing slots tournaments.
| JeffBet Casino – Key Features | |
|---|---|
| Launched: | 2022 |
| Owner: | ProgressPlay |
| Licence: | UKGC, MGA |
| Welcome Bonus: | 100% up to £100 + free spins |
| Number of Slots: | 1,500+ |
| Slot Types: | Video, Progressive, Megaways |
Let’s now take a look at an example slots tournament at JeffBet. This was the ‘Vegas Reel Stars’ tournament that ran for two weeks in the spring of 2025. It offered a complete prize pot of £5,000, with £1,500 heading into the leaderboard topper’s casino account. Anyone finishing in the top 20 places on that leaderboard was guaranteed a prize of at least £25. All Playtech’s ‘Vegas’ slots were eligible for the tournament, including Book of Inferno, Lights of Luck and Lil Demon: Blazing Lava. Anyone could enter the slots tournament by depositing a minimum of £10 with the ‘VEGAS’ JeffBet bonus code.
7. Our Pick for Mobile Slots – 888casino
The 888casino has been around since 1997 and was established as an internet-only gambling site. Thanks to the success of 888’s poker app, the owners of 888 decided to make sure all their gambling sites were mobile-friendly, and that is a position they strived to maintain. The brilliant 888 casino slots and roulette app is available at the Apple App Store and Google Play, ready to download, install and instantly give you access to many dozens of fantastic and playable slots.
| 888Casino – Key Features | |
|---|---|
| Launched: | 1997 (as Casino-on-Net) |
| Owner: | Virtual Global Digital Services |
| Licence: | UKGC, Gibraltar |
| Welcome Bonus: | 50 no-deposit free spins + 100% bonus up to £200 |
| Number of Slots: | 2,000+ |
| Slot Types: | Video, Classic, Megaways, Progressive, Exclusives |
As well as boasting all the latest slots, via the 888casino app, you can access Pragmatic Play’s complete range of Drops & Wins Slots such as John Hunter and the Book of Tut, Release the Kraken and The Hand of Midas. Many of Big Time Gaming’s Megaways slots are available too, plus 888casino can offer its own daily jackpot, which has to be awarded every day, and can be won simply by playing slots such as Magic Miner, Riches of Venice, Book of Scrolls and many more! And don’t forget, all these games can be played on any mobile device!
Reel to Reel Comparison
Let’s now make a direct comparison of the best slots sites in the UK. Via the table below, you’ll find all the important snippets of information of interest to the UK’s slots players. Compare the information presented, then head to the site that you feel meets your slotting needs the most!
| Slots Site | Launched | UKGC Licence | No. of Slots | Slot Types |
|---|---|---|---|---|
| 21LuckyBet | 2022 | 39335 | 1,800+ | Video, Classic, Megaways, Progressive |
| Ladbrokes | 2000 | 54743 | 1,800+ | Video, Classic, Megaways, Progressive |
| Casumo | 2012 | 61549 | 3,500+ | Video, Classic, Progressive, Megaways, Slingo |
| Paddy Power | 2004 | 39411 | 600+ | Video, Classic, Progressive, Megaways, Exclusives |
| HighBet | 2021 | 44662 | 2,200+ | Video, Progressive, Megaways, Slingo |
| JeffBet | 2022 | 39335 | 1,500+ | Video, Progressive, Megaways |
| 888casino | 1997 | 39028 | 2,000+ | Video, Classic, Megaways, Progressive, Exclusives |
What to Look for at UK Slots Sites
There are a decent number of top slots UK sites we’re happy to recommend to you, but you are quite welcome to seek your own path towards slotting enlightenment. But what should you look out for when evaluating a site for its video slots goodness? Below, we’ve outlined a few aspects of slots websites in the UK that you should consider. These are what we look out for when deciding whether a UK online casino site is hot for slots or not!
1. Number of Slots
The best UK slot sites offer hundreds, if not thousands, of online video slots. The higher the number of slots that a site offers, the more likely you are to find a slot that appeals to your slotting sensibilities. There are tens of thousands of slots available in the overall slotting realm, so there really is no excuse for an online casino not to offer as many slots as possible in order to please their players.
2. Variety of Slots
Slots come in all shapes and sizes, which is something that we will be exploring later. Not only should all the top slots sites in the UK offer a good number of games, but they should also offer a good variety. Video slots, classic slots, progressive jackpot slots, Megaways slots, cluster pays slots … slots software providers are inventive and don’t simply churn out the same slot time and time again. Variety is the slotting spice of life!
3. Payout Rates
Top UK Slot Sites for 2025 - Find the Best Slots Websites4. Bonuses and Promotions
Any UK slots site worth its slotting salt will offer a decent welcome bonus, and hopefully one that includes no-wagering free spins. The best sites keep the bonuses and promotions coming even when you’ve wagered the life out of your welcome bonus. Look for sites that offer deals and free spins for regular players, and especially ‘free to play’ games where you can win cash, bonuses and free spins without paying a penny of your own cash.
5. Slot Tournaments
Tournaments at UK gambling sites with slots can be entertaining as long as you are sensible. Such competitions pit slot enthusiasts against one another to see who can win the most from a specific slot (or slots) during the allotted time period. Players topping the leaderboard at the end of the competition win cash and bonuses. We say be sensible here – there’s no point spending £1,000 playing slots to win a £500 top prize, is there?
6. Mobile Performance
Online slots are ideal for mobile devices and indeed all of them are written in HTML5 – a coding language designed specifically for internet-based play. The best slots websites in the UK offer apps for both iOS and Android that can be downloaded and fired up whenever the slotting fancy takes them. Not all sites provide dedicated casino apps, but you can still access them on your iPhone, iPad or Android tablet using a mobile browser.
7. Licence and Safety
We assume, as you are reading these pages, that you are a resident in the UK. In that case, you should, for your own safety, only play at slots websites in the UK that have a UKGC licence. This does not limit your choices as the UKGC has issued over 2,000 licences (see the full register) since it came into existence in 2007. You are, of course, free to choose slot sites that do not have UKGC licences, but should you run into trouble at them, you won’t be able to get any help.
Slots Volatility and RTPs
We have already mentioned RTP (return-to-play) as an important measure of a slot’s playability, but we didn’t really explain that much about it. We are now going to do so, and we’ll introduce you to another couple of terms that are important when evaluating slots at slots websites in the UK – volatility and variance. You’ll need to understand these terms when picking out the best slots to play, so here goes …
Return to Player (RTP)
Return to Player is expressed as a percentage. If a slot has an RTP of 96%, then after a prolonged playing session, a player will have 96% of their original bankroll remaining. Before a new slot is released, millions of simulated spins take place to ascertain a slot’s RTP, and features of the slot are adjusted if the RTP comes out too high or too low.
RTP is only a theoretical measure, as slots are incredibly volatile. If you begin a playing session with £100 on a slot with an RTP of 96%, then you are around 4% more likely to end up with nothing as you are to end up with £200. The longer you play, the more likely you are to end up with £96, which is 96% of your original bankroll.
Return to Player is expressed as a percentage. If a slot has an RTP of 96%, then after a prolonged playing session, a player will have 96% of their original bankroll remaining. Before a new slot is released, millions of simulated spins take place to ascertain a slot’s RTP, and features of the slot are adjusted if the RTP comes out too high or too low.
RTP is only a theoretical measure, as slots are incredibly volatile. If you begin a playing session with £100 on a slot with an RTP of 96%, then you are around 4% more likely to end up with nothing as you are to end up with £200. The longer you play, the more likely you are to end up with £96, which is 96% of your original bankroll.
Volatility
A slot’s volatility refers to how frequently it pays and the size of the payouts. If you compare this to roulette, then a low volatility bet would be on red/black. With this bet, you would win just under 50% of the time, but you would only win your original stake. A high volatility bet would be on a single number. You’d win on average once every 37 spins with this bet, and the payoff for a win would be 35 times your stake.
You should choose to play a slot with the volatility that matches your playing style or level of patience. If you want to win little but often, then choose a low volatility slot. If you are willing to bear lots of losing spins in the hope of a big payout, then choose a high volatility slot. Mid volatility slots, of course, give you the best of both worlds.
A slot’s volatility refers to how frequently it pays and the size of the payouts. If you compare this to roulette, then a low volatility bet would be on red/black. With this bet, you would win just under 50% of the time, but you would only win your original stake. A high volatility bet would be on a single number. You’d win on average once every 37 spins with this bet, and the payoff for a win would be 35 times your stake.
You should choose to play a slot with the volatility that matches your playing style or level of patience. If you want to win little but often, then choose a low volatility slot. If you are willing to bear lots of losing spins in the hope of a big payout, then choose a high volatility slot. Mid volatility slots, of course, give you the best of both worlds.
Variance
Variance is tied to volatility, but it is not quite the same. Think of variance as ‘varying from the norm’. A person with low variance will eat a ham sandwich every day for lunch. A person with high variance will have sandwiches, salad, noodles, ramen, wraps, burgers … you’d simply never know what was in their lunchbox.
Think of slots the same way. Low variance slots tend to slowly whittle away your bankroll with the hope of landing that big win. High variance slots are more streaky – you might encounter a dozen winning spins in a row, followed by a dozen losing ones. Again, select the type of slot that matches your expectations when playing slots.
Variance is tied to volatility, but it is not quite the same. Think of variance as ‘varying from the norm’. A person with low variance will eat a ham sandwich every day for lunch. A person with high variance will have sandwiches, salad, noodles, ramen, wraps, burgers … you’d simply never know what was in their lunchbox.
Think of slots the same way. Low variance slots tend to slowly whittle away your bankroll with the hope of landing that big win. High variance slots are more streaky – you might encounter a dozen winning spins in a row, followed by a dozen losing ones. Again, select the type of slot that matches your expectations when playing slots.
Highest RTP Slots in the UK
To get you started on your slotting journey, we have picked out ten of the best slots commonly available in the UK with high RTPs. To save you the need for a slotting map and compass, we have also indicated at which of our top UK online slots sites you can play them.
| Slot | Developer | RTP | Theme | Play at |
|---|---|---|---|---|
| Madame Destiny Megaways | Pragmatic Play | 98.03% | Magic | Casumo |
| Blood Suckers | NetEnt | 98% | Vampires | 21LuckyBet |
| Starsign Clusters | G Games | 97.5% | Space | 888casino |
| Captain’s Treasure | Playtech | 97.06% | Pirates | SkyBet |
| Epic Joker | Relax Gaming | 97% | Classic | HighBet |
| Jolly Roger | Play’n GO | 97% | Pirates | JeffBet |
| Book of Kings | Playtech | 96.64% | Ancient Egypt | Paddy Power |
| Crystal Lotus | Eyecon | 96.56% | Flowers | MagicRed |
| Extra Chilli | Big Time Gaming | 96.42% | Food | Betfair |
| Starburst | NetEnt | 96.09% | Space | Ladbrokes |
Why UK Players Love Online Slots
When you pop across to any online casino in the UK, you could be forgiven for thinking that it’s a slot site in the UK, and nothing more! Many online casinos offer table games and live casino play as well, but slots lead the way by some distance. But what makes slots so universally popular? Here is why we, as slots players ourselves, simply cannot get enough of them.
Huge Variety
Blackjack is basically blackjack, roulette is basically roulette, but slots are different. Each slot has its own design and, often, its own way of functioning. The number of reels, rows and paylines can be tailored to give a unique slotting experience. Slots have different symbols, scatters, wilds, side games and paytables. The most imaginative slots providers build slots with interesting features and game dynamics, creating games that are eminently playable, time and time again.
Of course, if you do get bored with one slot, it’s very easy to move onto a different one! New slots are released almost on a daily basis, so there’s always the chance of a brand new hot slot emerging. You can’t say that about table games!
Convenience
Slots are the easiest game to play. You just load them up, set your stake, then set the reels a-rolling. You can play them on your desktop PC, your laptop, your phone, your tablet, even your internet-enabled rice cooker (okay, so we’re lying about the last one). They are quick too – each spin takes only a couple of seconds, unlike, say, a single deal of blackjack or one revolution of the ball around a roulette wheel.
Slots don’t require dedicated play either – just a few spins will do, and if you don’t like how the reels are falling, you can just find another slot.
Better Payout Rates
As long as you stick with slots that have high RTPs, you will get the best payout rates available at most top slots sites in the UK. True, there are table games with low house edges (baccarat, single deck blackjack, video poker, European roulette), but they just are not as entertaining, and you certainly do not get as much variety as you do with slots.
Bigger Jackpots
Progressive slots make people millionaires. Although we have to admit that we can’t think of any people who’ve quit their day jobs because they’ve money a load of dosh playing pai gow poker (unless they had a load of dosh to gamble with in the first place).
So, how much can you win? Believe it or not, the biggest progressive jackpot win (as of June 2025) is over £42 million won on WowPot Mega just before Christmas 2023 (ho ho ho). One lucky player won almost €20 million on Mega Moolah Mega in April 2021, and Jackpot Giant handed someone £9.4 million in October 2018. If you really want to win big at slot websites in the UK and don’t mind the odds, the progressive slots are what you need to be playing.
Free Spins
Free spins are easy for online slots sites in the UK to hand out, and even at times without wagering attached. As part of a bonus deal at any online casino, you are much more likely to get free spins than you are free chips to play blackjack, roulette or any other table games.
Keep an eye out for free-to-play games if you like free spins. You get to play the free-to-play game every day (for free) and free spins are the most common prize awarded when you win. You can build up quite the bankroll simply by playing free-to-play games daily and wallowing in all that free spin goodness.
Play on Mobile
We’ve already mentioned this in relation to convenience, but slots are definitely the best game to play on mobile devices. All you really need to see are the reels, and you also need a button to set those reels in motion … and that’s it. Compare that to blackjack, where you need to see your cards, the dealer’s cards, your chips, the buttons to hit, stand, double, surrender, split … your screen, even at the best slot site in the UK, would soon be filled with info. Also, try and imagine using your phone to accurately place chips on the roulette table!
If you enjoy playing mobile games, then when it comes to online casinos, you’ll soon discover that slots are numero uno!
Slots Sites Bonuses and Promotions
One of the best benefits of being a regular at the top slot sites in the UK is taking advantage of bonuses and promos. All online casinos offer a welcome bonus of some description (hopefully containing free spins), but the very best offer a regular supply of promotions aimed at their most loyal players. Below, we take a semi-deep dive into the type of casino bonuses and promotions you are most likely to come across.
New Player Offers
- Welcome Offer – A welcome offer at an online casino takes your initial deposit at the casino and matches it with bonus cash. Sometimes, the deal may pay double, or even triple your deposit. Bonus money can only be used to play the games at the site and cannot be withdrawn. Once you have used your bonus money, any winnings are likely to be subject to wagering requirements before you can cash them out. For that reason, you should always check the terms and conditions to see what those requirements are.
- Free Spins – Free spins at UK slots websites are slotting spins that you don’t have to pay for. They will have a set value (usually £0.10 per spin) and may be tied to a specific slot, a particular range of slots or any slot that’s available at the site. Sometimes winnings from free spins are paid as cash, but most of the time they are paid as bonus money that will come with wagering requirements. Free spins aren’t usually valid for long (24 to 72 hours), so make sure you use them within the allotted timeframe. Top UK Slot Sites for 2025 - Find the Best Slots Websites – A cashback deal will pay you back a percentage of your weekly losses at gambling sites in the UK with slots. If the site you are playing at has a 10% weekly cash back deal, and you lose £50 during the week, then £5 will be returned to your account. Typically, cashback is paid as bonus cash with T&Cs attached. Rakeback is similar to cashback except that it is paid on money that you’ve wagered, not money that you’ve Top UK Slot Sites for 2025 - Find the Best Slots Websites.
Regular Player Offers
- Reload Bonus – The best online slots sites in the UK do not stop at the welcome bonus. Regular players can claim other bonuses once they’ve completed wagering on the welcome bonus, or the welcome bonus has timed out. Reload bonuses work in exactly the same way. Sites may offer a weekly reload bonus (on specific days – weekends are popular) or even daily. Some sites – especially new casino sites – go as far as offering a reload bonus on every deposit made! As ever with any bonus, always check the T&Cs so you know what exactly is expected of you.
- Featured Games – Competition among the best online slots sites in the UK is fierce, as you can play your favourite slots at most of them. In order to influence your playing choices, many slots sites will announce a new arrival in their slotting catalogue with fanfares and – hopefully – free spins or some other bonus. Many sites have a ‘game of the week’ category where you can play a new title with free spins, or if you wager a sufficient amount on the chosen slot, you may be eligible for some kind of bonus goodies.
- Slot Tournaments – We’ve already touched on slot tournaments, and while we are a bit on the fence about them, many players do enjoy participating in them. We feel they are fine as long as you are sensible and don’t over-wager just to grab some mundane prize pot. You usually have to opt in to slots tournaments, and you get to compete with your fellow UK slot site users to see who can coax the most virtual coins out of the specified slot within the specified timeframe. Having explained all this, slots tournaments are not popular at sites with UKGC licences.
- Loyalty Programs – Loyalty programs, or VIP schemes as they are also known, are another aspect of even the best UK slots sites that the UKGC would like to phase out. They reward you for playing at UK casinos online, but only if you are a regular player. Typically, the more you wager at a site, the higher up the scheme you rise. Each time you ascend a tier, you will receive bonuses, other goodies, faster withdrawal times and better support. Sadly, you need to maintain your wagering at tier levels, else you will suffer the indignity of a demotion.
What Kind of Slots Can You Play?
There is so much variety when it comes to slots that it’s impossible to categorise all of them, but that’s not going to stop us from trying! Below are some basic types of slots, and most slots at any site that qualifies for a best slots website UK list can be put into one of the following categories.
Classic Slots
Most people in the UK are familiar with fruit machines, or one-armed bandits. These slots have three reels and a single payline right across the middle. Online, these types of slots are known as classic slots or pub slots, or simply three-reel slots. You pay your stake, hit the spin button, and if you land a winning combo along the middle line, you get paid. Classic slots are notably devoid of bells and whistles.
Video Slots
Video slots were invented in the US in the 1980s thanks to advances in video and microchip technology. Video screens replaced mechanical reels, and the humble three-reel slot died a death, especially in Las Vegas. Video slots typically had five reels, multiple paylines, wilds, scatter and side games. The majority of slots at online slots sites in the UK are video slots, each with a unique set of symbols, game features and paylines.
Cascading Reels
Invented by NetEnt for their classic slot Gonzo’s Quest, cascading or avalanche reels are reels where winning symbols cascade or tumble off the reels. To fill in the gaps, new symbols cascade in from above, potentially triggering fresh wins and further cascades.
In tandem with cascading reels, each consecutive cascade triggers a winning multiplier, so the more consecutive cascades you land, the more your win is multiplied. Once your cascading run ends, the multiplier is typically reset back to x1.
Cluster Pays
Cluster pays slots, such as Play’n GO’s Reactoonz, are known for their large playing screens and look more like ‘match-three’ games like Kandy Krush. Instead of spins, on each turn of a cluster pays slot, the screen will fill with symbols. A cluster is a minimum number of identical symbols that are adjacent to each other, vertically or horizontally, but not diagonally. The larger the cluster, the more you win.
Cluster pays slots almost always have the cascading reels and multiplier motif. Winning clusters are removed from the screen, allowing potential new clusters to be formed.
Megaways Slots
An invention by Big Time Gaming and initially applied to their Bonanza slot, Megaways is a feature that took the slotting world by storm in 2016. The Megaways mechanic upped the number of reels to six, and randomised the number of symbols landing on each individual reel spin between two and seven. As this was an ‘all ways pays’ slot, this upped the maximum number of winning paylines to a mammoth 117,649!
Bonanza Megaways proved so popular that Big Time Gaming added the mechanic to other slots, and then other slot software designers decided they wanted a piece of the Megaways pie. Happily, instead of aping BTG’s design, BTG’s rivals avoided plagiarism lawsuits by paying BTG for the use of the Megaways mechanic. Now, there are over 100 Megaways slots that you can choose from.
Progressive Slots
Another Las Vegas invention, the ‘progressive’ dynamic was added to some real-world slots in the late 1980s. In the pre-Internet days, they were connected by radio signals. A small proportion of each player’s stake was added to a jackpot, which could only be triggered by a rare combination of winning symbols. Any of the linked machines could trigger the jackpot. It took until February 1987 for the first progressive jackpot of just under $5 million to be won.
These days, progressive slots, such as Games Global’s Mega Moolah (formerly owned by Microgaming) are connected via the internet and can be played at any number of UK slots sites. Many people have been made millionaires by progressive jackpot slots (see below), but it’s important to note you only get the full jackpot (if you are fortunate enough to win) if you’ve played your winning spin with the maximum bet amount.
| Top Progressive Jackpot Slots | ||||
| Slot | Provider | Max Bet | Base Jackpot | Biggest Payout |
|---|---|---|---|---|
| WowPot Mega | Games Global | £20 | £2,000,000 | £42,149,180 |
| Mega Moolah Mega | Games Global | £5 | £1,000,000 | €19,429,358 |
| Jackpot Giant | Playtech | £4 | £1,000,000 | £9,211,049 |
| Dream Drop Mega | Relax Gaming | £100 | €2,000,000 | €2,986,133 |
| Joker Millions | Yggdrasil | £25 | €100,000 | €7,831,370 |
| Hall of Gods Mega | NetEnt | £50 | €500,000 | €7,820,888 |
| Jackpot King | Blueprint Gaming | £10 | £250,000 | £1,349,783 |
| King Cashalot | Games Global | £2.25 | £100,000 | £1,527,228 |
| Leprechaun’s Lock | Playtech | £100 | £250,000 | £321,270 |
| Aztec’s Millions | RealTime Gaming | $5 | $1,000,000 | $4,420,568 |
Popular UK Slots Features
So what can you expect from the leading online slots at the best UK slots sites? Below are some key aspects of the slotting game mechanics that you are most likely to come across when playing slots.
- Scatter Symbols – Most slots feature scatter symbols. Typically, you need to land three or more scatter symbols anywhere on the playing grid to either trigger a win or a feature.
- Wild Symbols – Again, most slots feature wild symbols. They substitute for any symbol if, in doing so it a winning combo is created. Note that if a wild triggers multiple winning combos on the same payline, then only the highest paying combo is paid.
- Roaming Wilds – A game dynamic in which, instead of disappearing from the screen after a spin, wild symbols ‘roam’ around the reels per spin until finally they disappear. Examples: Jack & the Beanstalk (NetEnt), Road Kill (NoLimit City).
- Expanding Wilds – With this feature, when a wild symbol lands on the reels, it expands so that wild symbols fill the reel in its entirety. Example: Starburst (NetEnt), Rich Wilde & the Book of Dead (Play’n GO).
- Respins – A respin is a spin that you don’t have to pay for. Many slots have respins after a winning spin, or respins are rewarded randomly, or when a feature is triggered. Examples: Vikings Go Bezerk (Yggdrasil), The Dog House (Pragmatic Play).
- Multipliers – Multipliers multiply the value of your win. Many slots add accumulating multipliers that are triggered by successive wins. Examples: Gonzo’s Quest (NetEnt), Big Bass Splash (Pragmatic Play).
- Symbol Upgrades – With this feature, when triggered, low-paying symbols (usually playing card values or symbols) are replaced with high-paying symbols for a specified number of spins. Examples: Olympus Unleashed (Push Gaming), Lady Luxe Joke (JFTW).
- Bonus Games – Another popular mechanic that, when triggered, replaces the reels with some manner of game that doesn’t rely on spinning reels. Examples: Immortal Romance (Games Global), Money Train (Relax Gaming).
- Unlockable Features – With some games, the more you play in a single playing session, the more beneficial features (such as bonus games and multipliers) you unlock. Examples: Thunderstruck II (Games Global), Blood Suckers (NetEnt).
Note that some slot features available at non-UKGC casinos, such as autoplay, turbo spins, buy feature and gambling wins, have been outlawed by the UKGC (read the UKGC announcement here).
The UK’s Best-Loved Slots Providers
Even the best UK slots sites don’t make their own games. Instead, they rely upon top game software providers to create games, and then they lease them for a fee. This is why you encounter the same slots time and time again at different sites. But who are the best-loved slots providers in the UK? Consult the table below, and that question will be answered!
| Provider | Founded | Noted For | Notable Games |
|---|---|---|---|
| NetEnt* | 1996, Stockholm | High-quality slots | Starburst, Gonzo’s Quest |
| Games Global** | 2022, Malta | Progressive jackpots | Immortal Romance, Thunderstruck II |
| Play’n GO | 2005, Stockholm | Prodigious output | Rich Wilde & the Book of Dead, Reactoonz |
| Pragmatic Play | 2015, Gibraltar | ‘Drops & Wins’ | Big Bass Splash, Buffalo King |
| Playtech | 1999, Isle of Man | Franchise slots | Age of Gods, Kingdom’s Rise |
| Big Time Gaming* | 2011, Australia | Megaways | Bonanza Megaways, Vegas Megaways |
*NetEnt and Big Time Gaming are now owned by noted live casino providers Evolution (formerly Evolution Gaming).
**Many sites claim Games Global is the new name of Microgaming, which is not true. Microgaming simply sold its entire gaming catalogue to Games Global in 2023.
Top Tips for Slot Players
Slots are easy to play and are entertaining too, which explains why they are so popular. To get the most out of your slots play and to give yourself a decent chance of ending a session in the black, there are some recommendations you can follow. Below are our tips for beneficial slots play at any UK online slots site.
Play High RTP Slots
We’ve already taken a deep look at RTP, volatility and variance. Of these, RTP is the most important aspect. Also, check a slot’s RTP before playing and select slots with RTPs in excess of 95%, or even 96% if possible. Play at the best payout casinos wherever possible.
Use Bonuses Wisely
You can get a lot from deposit bonuses and free spins if you use them wisely. Firstly, always check the T&Cs completely so you don’t fall foul of any ‘dubious’ term. Secondly, use high RTP slots to work through your wagering. Thirdly, if you do end up with money after completing all bonus requirements, withdraw it and go and treat yourself to a coffee, a new iPhone or your own personal Caribbean island, depending upon how much you won.
In addition, if a bonus has unfriendly terms and conditions, then don’t waste your time with it, no matter how lucrative it may seem on the surface.
Play to Be Entertained
Only progressive jackpot winners have gotten rich playing slots, and progressive jackpot winners are rarer than big money lottery winners. The odds are against you if you’re aiming to become a career slots player, and if you make a success of it, then you are the first!
It’s far better to be sensible and view slots as something to be entertained by. Choose the slots you love rather than those that promise to pay big if you keep on pumping in your pennies for hours, if not days. Plus, if you do play for fun, then any big win will come as a nice surprise!
Set a Budget
Only play slots at slot sites in the UK if you can afford to. That goes for all forms of gambling – only ever play with money that you can afford to lose. One tactic many people use successfully is to set a monthly budget and then divide that by 10 to get their daily budget then divide that by 100 to get their stake size. Once your daily or monthly budget has been exhausted, then wait until tomorrow or next month. Never chase losses (once your money has gone, it’s gone) and never use money to gamble that’s needed elsewhere for the more important aspects of life, such as rent, mortgage payments, grocery bills or utilities.
Quit When You’re Winning
Only spend your slots winnings on slots if you truly love slots. If you do manage to double your daily or even monthly bankroll, then why not take a break, take advantage of your good fortune and spend the money on something else? A nice new pair of shoes, a romantic meal or a weekend getaway … all potentially more enjoyable than playing slots.
Play Responsibly
We are all prone to irresponsible gambling from time to time, especially when we hit those dread losing streaks, but some of us are more prone to it than others. If you find yourself spending a little more time and money at UK slots sites than you are comfortable with, then there are tools at nearly all sites that can help. You can set deposit limits, time limits and have reality checks pop up on your screen once you’ve been playing for a specified amount of time.
Of course, if you get really uncomfortable about your gambling, you can choose to self-exclude. You can do this via GAMSTOP, which will exclude you from all UKGC-licensed sites for a set period or permanently. Of course, you will still need to exercise a fair degree of self-control, as sites without UKGC licences can still be accessed even if you have registered with GAMSTOP.
Organisations such as Gamblers Anonymous and Gambling Therapy can help too.
Best Slots Sites in the UK – Our Verdict
With thousands of slots available at all the best new slots sites in the UK and well-established ones too, boredom is never a factor when spinning the reels. We hope this page has educated you and helped you achieve a high rank as a slotting master. Just remember to play responsibly and follow our top slotting tips, and you will soon be reeling in the rewards.
Responsible Gambling
UK Slot Sites FAQ
What is the best UK slot site?
If you consult our carefully constructed list of the top 10 UK slots sites right at the top of this page, then the answer to that particular quandary is clearly provided.
What slot pays out the most in the UK?
No slot really leads the field when it comes to paying out, and winning payouts are never guaranteed. If you choose slots with RTPs in excess of 96%, then these give you the best chance of coming out of a playing session in the black.
Are some features on UK slots restricted?
Yes - following a review by the UKGC in 2020 and 2021, the UK's gambling licensing body banned autoplay, turbo or quick spins, buy feature, and gambling wins from slots available at UKGC-licensed gambling sites. It also banned slots from overtly celebrating ‘wins’ that were smaller than the cost of a spin.
What is the best slot site for mobile?
We refer you back up towards the top of this page, where our selection for ‘our pick for mobile slots’ will be revealed.
Marta Cutajar
Marta Cutajar is an experienced iGaming and sports betting writer with over 7 years of experience in the online gambling industry. She has written extensively for major online casinos and sports betting sites, covering betting guides, casino reviews, and regulatory updates.