Best Online Slots Sites UK: Top Slots Sites UK May 2025

Read on to see our pick of the very best slot sites and new slot games for UK players, the types of games you can expect to find at them, and how to claim your exclusive sign-up offers.

UK Online Slots Sites

Only the best UK online casinos hold licenses for the UK, and playing online slots has its own pros and cons. When looking for the best slot sites, it is important to consider factors like promotions such as casino free spins no deposit offers, customer support, mobile usability, and of course game variety when you’re choosing the best slot sites. Below are some of the the best UK slot sites we have found.

💎 Mr Vegas

The Mr Vegas casino bonus is one of the really luxurious online slot sites offering a great experience, channeling all the glitz and glamour of Sin City, and bringing it directly to your desktop or mobile device. New players will get a big matched deposit bonus up to £200 + 11 bonus spins to kick off in style!

There are well over 8,000 casino games to play at Mr Vegas, including branded titles like The Goonies Hey You Guys, classics like Fruit Shop Frenzy, and cash-themed games such as Break Da Bank Again. There are also classic table games like blackjack, roulette, and poker, plus a thrilling live casino. Mr Vegas is one of a number of casinos that accept Skrill in the UK.

💎 BetVictor

BetVictor casino is one of the best UK slot sites, and while it is mainly known for sports betting, don’t let that fool you - the online casino offering is excellent too. You’ll get a big deposit match when you sign up, and you can use it to explore a huge range of slots including top titles like Book of Dead and Eye of Horus; exclusives like Crack the Code and BetVictor branded Megaways; and thrilling Drops & Wins games like Wolf Gold and Great Rhino Megaways. 

The jackpot slots at BetVictor also really stand out, and you can have a go at games in the Jackpot King series, where the top prize pots can reach seven figures.

💎 LeoVegas

LeoVegas online casino is one of the best online slot sites UK for players! Here you can play slots and look forward to a seriously good selection of games including slots, jackpots, table games, live dealer games, and even bingo. Amongst the array of slot games, you can try your luck on new titles like Rat King and Candyways Bonanza, explore LeoVegas branded exclusives like LeoVegas Megaways and Star Supreme, and you might even be lucky enough to land one of the massive eight-figure jackpots!

New LeoVegas players get a matched deposit bonus and free spins, plus regular players get free spins offers, online casino bonuses, and special weekend promotions.

💎 Casimba

When you sign up for your Casimba account, you’ll get not only a matched deposit bonus but also 50 bonus spins to help you explore top games. Casimba has over 100 live dealer tables and classic table games, plus more than 2,000 slot games from providers like NetEnt, Pragmatic Play, and Play’n Go.

Some of the top games to try at Casimba include Fire Joker, Starburst, and Big Bass Splash,  plus there are tons of new titles like Mustang Trail, Dunk Buddy, and Safari Sun. There are even several titles in the Mega Moolah series like Juicy Joker Mega Moolah and Mega Moolah Goddess, where you could take home a seven-figure jackpot.

💎 21 Casino

Slots games in the UK continue to grow, and 21 Casino is a top-quality UK slots gambling experience, where you can look forward to a matched bonus to use on slots, plus a live casino bonus on your first deposit. 

From top titles like Eye of Horus, Fluffy Favourites, and Book of Dead, to new games like Amazing Catch and Coba Reborn, there’s something for everyone. 21 Casino also has some exclusive game options like Joker Bonanza Cash Spree, plus exclusive roulette and blackjack tables. This casino is one of the best places to play jackpot games, and at any one time there are four jackpot levels, including the Mega jackpot that can reach eight figures.

💎 William Hill

William Hill is a destination for gambling, whether it’s sport betting, bingo, live casino tables, poker, or slots you’re into. When you sign up for a new William Hill account, you can look forward to exciting promotions like 200 free spins, bonus drops, and regular prize draws to keep things interesting!

The slot selection at William Hill casino is excellent, and the exclusive titles like Gus Goes Fishin’ and William Hill Gold Link & Win really stand out. New games are added all the time, and some games come with special features like Drops & Wins, bonus rounds and free spins.

💎 Pub Casino

Pub Casino welcomes new players with a 100% welcome bonus up to £100! You can make use of reputable casino payment methods as you enjoy this safe online casino, on either desktop or mobile.

If you can think of an online slot game, chances are you’ll find it at Pub Casino. The selection includes titles like Wolf Gold, Sugar Rush, and Gates of Olympus, plus new titles like Captains of the Coast, Mighty Wild Panther, and 16 Coins. There’s also a great assortment of mind-blowing jackpots like Sisters of Oz Wowpoint, Atlantean Treasures Mega Moolah, and King Kong Cash.

💎 Bet365

Bet365 UK casino is a household name in gambling and one of the top UK slot sites, so it’s no surprise it has an outstanding online casino, and when you sign up, you’ll get up to 200 free spins on your first deposit. In addition to the casino games, you can enjoy sports betting across all of the top local and international events.

The desktop and mobile experience at bet365 casino is one of the smoothest and best when it comes to visuals and navigation. The game selection is astounding, and you can try Bet365 Originals like Graffiti Rebellion, Apocalypse Riders and 8 Immortals Full House Fortune; huge Fire Blaze Jackpots; casino classics; new releases; and so much more at this £5 deposit casino.

💎 Video Slots

Video Slots is a fun online casino that’s packed with great graphics, special features, slots battles, massive jackpots, and so much more. You’ll get a matched deposit bonus and 11 free spins the first time you play.

With over 9,000 games to play at Video Slots, there’s absolutely no shortage of choice! There’s an immersive live casino, video poker, scratch cards, roulette, blackjack, and pretty much everything else you can think of, including slots. We were impressed to see all of the world’s best games here, including the likes of Starburst, Bonanza, Book of Dead, Big Bass Splash, and new titles are released every month.

💎 BzeeBet

With a sign-up bonus including a match and free spins, plus regular tournaments with five-figure prize pots, Drop & Wins, and free spins offers, there are so many reasons to sign up and play at BzeeBet casino .

BzeeBet has a great live casino with hundreds of tables, plus a full sportsbook, but the slots section is where this online casino really shines. There are almost 1,600 slots for you to explore, including popular titles, brand new releases, and games with amazing special features like megaways, gigantic progressive jackpots, and high-stakes bonus rounds.

Top 10 Best Online Slots

The number of different slot games out there is almost endless, and with themes ranging from Ancient Egypt, to animals, to classic-style games, there’s something for everyone. The slot games you’ll love will depend on your own personal preferences when it comes to not only the themes, but also the game’s special features like bonus rounds, special symbols, and paylines. If you’re looking for your new favorite slot game, these are some of our top picks from the best casino apps and new UK online casinos in the UK.

Age of The Gods

There’s a whole series of Age of the Gods slots, and you can play them at top online casinos like BetVictor. Brought to you by Playtech, these games are themed around ancient Greek mythology, so you can expect really immersive graphics, animations, and soundtracks to transport you to this different world. With special features like extra wilds and multipliers, plus 20 paylines, the Age of the Gods slots all come with a good chance of a win. The best thing about these games is that they hold seriously huge progressive jackpots, so you could be walking away with a prize of up to six figures.

Zeus Thunderbolt

Dream Vegas and other top UK online casinos have lots of games themed around mythology, and Zeus’s Thunderbolt is one of our top picks. With 30 paylines and a maximum bet of £5 per line, you could be in for a seriously huge win.

Land five of the Zeus icons and you’ll win 2,500x your stake, plus the game comes with wilds, and a respins feature. There are also scatter symbols, which award the special bonus game of 10 free spins, but you’ll also have the option to purchase your way into the bonus round so you don’t have to wait for it to trigger.

Starburst

If you’ve ever played at an online casino, you’re more than likely to have come across Starburst at some point - this NetEnt title is widely regarded as one of the most popular slots of all time. You can play Starburst at LeoVegas, which is no surprise given how impressive their game selection is.

Starburst doesn’t come with any complex gameplay or bonus rounds, and the simplicity means that it’s the ideal game for newer online casino players, so you could look to use any free spins on it. There’s a “win both ways” feature which gives you extra chances of winning, and it comes with a pretty high RTP of 96.1%. You’ll even have the chance to win a maximum top prize of £50,000, which is even better if you can get hold of Starburst free spins.

Book of Dead

There are loads of “Book of” slot games that you can play at top UK casinos like Casimba, but Book of Dead by Play’n Go is among the best of them.

Set in an ancient Egyptian tomb, you’ll be going on a journey with explorer Rich Wilde, and when you play you’ll need to look out for the special book symbol which acts as the scatter and awards you the free spins round! There are also expanding symbols to increase your chance of a win, plus Book of Dead comes with 10 paylines and an RTP of 96.21%, so it’s an excellent game to try.

Eye of Horus

Eye of Horus is one of many Ancient Egyptian themed games that you can play at 21 Casino. Created by Reel Time Gaming (a smaller studio), Eye of Horus is themed around the mythical Egyptian god, and the slot comes with a whole lot of special features like symbol upgrades, a bonus round of 12 free spin that can be re-triggered, and the chance to win an impressive fixed jackpot of 10,000x your stake! Eye of Horus has an RTP of a higher than average 96.31%, so you might just get really lucky when you play.

Fire And Roses Joker

Fire and Roses Joker is similar in theme to the hugely popular Fire Joker slot game, and you can play it at William Hill casino. The game is by Triple Edge Studios, and come with 5 reels, and a total of 720 paylines - that’s a lot of ways for you to win! If you get really lucky, you might win the top prize of 5,000x your stake.

This slot game is absolutely jam-packed with special features, like Wild Stacks (where wild symbols merge together), a collection pot, an increasing free spins multiplier features, and a free spins round that comes with a 5x multiplier. There’s even a jackpot wheel that can award you with a cash prize.

Big Bass Bonanza

You don’t have to be a fisherman to love the Big Bass Bonanza game (available at Karamba Casino) and its whole line of spin offs. The game comes with an above average RTP of 96.71%, and high volatility, and of course the impressive graphics and gameplay that you can always expect from Pragmatic Play titles.

If you land enough special symbols to trigger the bonus round, you could be awarded up to 10 free spins! The bonus round comes with multipliers, and cash symbols, plus you can re-trigger the spins. If you’re playing with the maximum stake, you could win over £500,000 if you’re lucky enough to reel in the top prize.

Emperor Of Rome

Emperor of Rome is a Playtech title that’s part of the Mega Fire Blaze series, available for you to play at bet365. This game is a pretty recent release, and it comes with an RTP of 95.88%, and a low volatility.

This game is set in the Colosseum, and you’ll be looking out for high value symbols like helmets, shields, and characters like Julius Caesar and even Cleopatra. If you land enough of the special Colosseums symbols, you’ll open up the bonus game, and if a coin symbol appears on the reels, you’ll double your win. These are some really unique and exciting special features.

Gold Blitz

If you love games themed around cash at Revolut casinos, you’ll love Gold Blitz, available at BzeeBet. The game is produced by the aptly named Fortune Factory, and features a game grid of 6x4 reels, and a massive 1,024 paylines.

While you’re playing, look out for the wild symbol that substitutes for other symbols, or land the collect symbol that rounds up more wins on your game grid. There are two different free spins features, both of which come with wild multipliers, and the ability to re-trigger the bonus round.

Types of Online Slot Machines

Classic Slots

If you picture the type of slot games you’d expect to see in a old-fashioned casino, you’re probably thinking of a classic slots games. These classic slots are usually very straightforward when it comes to gameplay and have a limited number of paylines and special features. The online versions of these games are designed to mimic the look of retro slot games, and the symbols you can expect are along the lines of bars, sevens, and fruit.

Video Slots

Video slots are the more modern-looking cousins of classic slot games that you might find on casino apps. These are the ones that tend to each have their very own theme and special characters, along with extra features like wilds, multipliers, and free spins. Video slots are highly immersive, and even come with animated elements and fun soundtracks! The symbols are also highly themed, so depending on the game, you could be looking out for magic carpets, huge fish, or illusive books.

Progressive Jackpot Slots

You might have come across some progressive slots (like Mega Moolah), where the top potential payout can go up to seven figures - these are usually progressive jackpot slots. The progressive jackpots increase every time someone anywhere in the world plays those jackpot slots games, that’s why it can get so big! Progressive jackpots can drop at any time, and usually the progressive jackpot slots have a few different levels of jackpots, so even if you don’t win the biggest one, you might still be lucky enough to get something special from jackpot slots.

Megaways Slots

When you play megaways slots, the number of ways to win is dramatically increased and can potentially go into the hundreds of thousands! This is because the number of symbols that land on each reel changes with every spin on megaways slots, which makes things really exciting. Megaways slots have been popular for years, and many of the top providers make them and can be found at many casinos with Apple Pay.

Interactive Online Slots

While every online slot game uses Random Number Generator technology and has a built-in RTP, there are some games where you’ll feel a little more like you have some control of the outcome (even if you don’t!). Some slots come with a gamble feature, where you need to guess the outcome of what is essentially a virtual coin toss, to stand a chance at increasing your winnings, and other slots let you choose your special feature, adjust the volatility of the game, or spin a wheel to get a prize.

Slots With Bonus Games

Many online slot games at ecoPayz casinos come with a special feature where you can win yourself some slots bonuses. Usually in the form of bonus games or free spins. You’ll usually trigger slots bonuses by landing enough of the special “scatter” symbols anywhere on the reels, and then you could get anywhere between about five and 20 free spins, depending on the game. You have a chance of a real win with the free spins spins, and any free spins winnings will be added to your balance.

Best Online Slots Site Offers at Trusted Casinos

Claiming special offers is a great way for you to boost your bankroll at new online casinos and use your increased funds to try out loads of fun slot games! Almost all online casinos have a new player offer, but freebies shouldn’t end there - top UK slot sites also have special offers for regular players, and even VIP programs for the high rollers.

When you sign up for an online casino account through a link at Bookies.com we’ll make sure you’re eligible for the very best possible offer, whether that’s a big matched deposit bonus, handy free spins, or even a cashback casino bonus on your early losses.

These are the types of online casino offers you should look out for on slot sites and sites with slingo:

Free Spins

Free spins no deposit bonuses are exactly what they sound like - these are spins that you don’t need to spend any money on, but you can use them on top real money slots and stand a chance at a real win. Some online casinos give you free spins just for signing up, while others require that you make a £1 minimum deposit casino first, and then you might get your free spins all at once, or in batches each day. Free spins are usually restricted to use on certain games, which can be a great way to discover games you wouldn’t have played otherwise.

Bonus Games

“Bonus games” is a term that some online casinos use interchangeably with “free spins”, when you need to make a qualifying deposit to get them. The active bonus spins are usually given on one game or a choice of a few, and you might need to meet wagering requirements before you can withdraw your winnings, just like you would with a welcome bonus. Don't forget bonus funds expire, so be sure to read the terms and conditions.

Deposit Bonus

A deposit bonus is a form of casino credit that you get when you make a qualifying deposit of a specified amount. The most common variation of a deposit bonus is a matched offer, where you’ll get a certain percentage match on your £3 minimum deposit casino, for example 100% casino bonus or 200% up to a specified amount. Deposit bonuses offer a lot of flexibility, as you can generally use them on any slot game (sometimes with a few exclusions), but they're often only available with popular methods like Visa and Mastercard, so Amex casinos and AstroPay casino sites require you to use another method.

No Deposit Bonuses

A free spins no deposit UK bonus is a rare type of offer, but you should definitely look out for these as they are pretty much risk-free. Some online casinos give you a small amount of free casino credits to use on games of your choice, or a few free spins on a certain game. No deposit bonuses are the perfect way to decide if you like the game selection and features of an online casino, before you play for your own money.

Loyalty Programmes

While almost all trustworthy online casinos have something for newbies, the best online casinos keep on rewarding you throughout your journey. Loyalty programmes might award points for your play, allowing you to move up levels and get better bonuses, or they might simply give you special bonuses and promotions as often as every day!

How to find New UK Online Slot Machine Games

UK players have thousands of slot games to choose from, as new ones have been released pretty much every month for years now! If you try out a new online casino, chances are you’ll find some slot machines that you’ve never seen before, possibly even exclusive titles with some fantastic pay by mobile casino and PayPal casino sites.

The big slot game providers like NetEnt, Pragmatic Play, and Games Global release new games on a regular basis, usually in batches of about two or three at a time, so the variety at your favourite online casino won’t ever get stale! We’d recommend checking the “new games” section in the online casino lobby every time you log in to see what’s new. You should also sign up to marketing emails from your online casino, so that you can get all the news about the latest releases delivered straight to your inbox.

Here at Bookies.com, we always know about the newest slot game titles, so we’ll make sure this page is kept updated so you can see which games you should be playing right now, and where to play them. Bookmark this page and come back regularly to get all the news. As well as playing slots, you might also like to enjoy other games, and we can help you find the best instant win games online and how to play baccarat online.

How to Play Online Slots

Even if you’ve never played online slots before, you’ll have just as much of a chance at a win as the next person. There’s no strategy for playing slot games, and because it’s all up to chance, there’s not much you can do to increase your chances of a win. Put simply, it’s as easy as pressing the “spin” button!

To make sure you understand the gameplay and ways to win, you can check the payable within the game info of the slot once you’ve opened it up. Here you’ll see all of the ways to win, as well as the different symbols and their value. Remember, you want to see the higher value symbols land on the reels, as these will give you a bigger win! All that’s left to do is select your bet per line and number of paylines, and start spinning. Almost all slot games have an “auto play” feature, so you don’t need to click the button manually to spin each time.

Most slot games work the same way - you need to match the same symbol on adjacent reels from left to right, on active paylines. This varies for some slots, for example games that have “cluster pays” or the “win both ways” feature. Thanks to Random Number Generator technology, you don’t have any influence over which symbols land. It's always best to seek the value you can out of your slots play, so let us help you find the best payout slots and best paying online casino sites in the UK.

Online UK Slots Sites Offers Terms and Conditions

It’s safe to say that all casino offers come with their own set of T&Cs, and we’d be a bit worried if we saw an offer that didn’t have any terms! There’s a pretty standard set of terms that apply to most online casino offers, but they do vary a little between the different casinos, so we’d recommend reading the T&Cs in full before you claim your offer.

Wagering Requirements

Most online casino promotions come with wagering requirements. This is the number of times you need to play through your bonus, deposit and bonus, or free spins winnings, before you’ll be eligible to withdraw. It’s always best to look for an online casino offer that has the lowest possible wagering requirements, and some offers even forgo these entirely, so you can withdraw your winnings immediately. The best fast withdrawal casino sites are always worth a look at.

Time Limits

You shouldn’t be too concerned if you see a time limit applied to your £20 minimum deposit casino bonus or free spins - most online casinos have these. You might be required to claim your bonus within a certain timeframe after becoming a new player, use your free spins or matched offer within a specific amount of time, or meet the wagering requirements within a certain amount of time to be able to withdraw.

Win Limits

Win limits usually apply to no deposit bonuses, so for example if you get 10 free spins on deposit, your win limit from those spins might be £10. However, win limits can also apply to deposit bonuses, so it’s a good idea to read the T&Cs carefully, as anything over your win limit might be forfeited.

Game Restrictions

Game restrictions can apply to free spins or matched offers, and they refer to the games you can use your bonus on. This is particularly important if you’re claiming a free spins offer, because you’ll need to check which games they’re valid on (usually just one game or a limited selection). Most deposit matches can be used on all slots, but there are sometimes exclusions like very high RTP games, jackpots, and live dealer games. 

Withdrawal Limits

Most sites on our list of UK casinos online will have a withdrawal limit, which can be per day, week, or month. Withdrawal limits are usually in the thousands, so they shouldn’t impact you unless you have a massive win, and in that case you might be able to ask the support team to raise your limit. VIP players also usually have higher withdrawal limits.

Are Online Slot Games Legal in the UK?

There’s good news for fans of UK Slots sites - online slot games are totally legal! In fact, the UK is very gambling-friendly in general, so sports betting, table games like online blackjack real money and online roulette for real money, poker, live casino sites, and bingo are all legal in addition to online slots. To be able to operate an online slots site in the UK, an online casino needs to be licensed by the UK Gambling Commission, and all of the best slots sites we recommend here at Bookies hold that license.

It’s important to make sure that you choose a licensed online casino, as this means that the casino has been thoroughly evaluated for safety and security, so you’ll have complete peace of mind while playing at the best slot sites.