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Best Slot Sites for UK Players: The Definitive Guide to Online Slots

Online Slots UK

Are you looking for the best slots sites in the UK to play games with high RTP and compete for real money wins? This is the right guide for you.

This article doesn't list all the UK slot sites on the internet. Instead, it focuses on the best UKGC-licensed online casinos where you find all the best games from the top developers in the world.

In other words, if you want to play the best free games for real money in the UK, you'll love this guide.

Continue reading to learn:

We also included a comprehensive list of free spins bonuses to play the best online slots for free. Use all the bonuses on this page to play free games to win real money in the UK — please remember that T&Cs apply to all bonuses.

Best Online Slots Sites in the UK: 2020 List

Looking for the best slots to play? Register a free account on one of these five sites to access over 5,000 online slot machine games and play for fun or real money prizes!

All the sites included in the list are licensed by the United Kingdom Gambling Commission and are authorised to offer real money online slot games to UK players.

These sites are safe and pay their winnings regularly. All the online slots on these sites are fair and are audited by third-party agencies to protect players like you.

Top 5 Slots Sites in 2020

  1. 888Casino: The best no deposit bonus to play online slots in the UK.
  2. A great platform to combine online slots with excellent live dealer games.
  3. BGO Casino: The best website to find all the best new online slots
  4. partycasino: A massive collection of online slots from the top developers.
  5. Unibet Casino: The best site to play online slots and poker games.

Are you looking for a great website to play online slots? Register on one of the 5 best UK slot sites in 2020 to get immediate access to thousands of games!

These slot sites offer the best mix in terms of quality (and quantity) of the offer, usability of their platforms, mobile apps, and safe payouts.

Every beginner should play on those slots sites. They are the best all-around solutions to play online slots in the UK and they all offer welcome bonuses on signup.

Where to Play Slots with the Highest RTP?

While you should never play gambling games to make money, most players like to play for cash.

Online slots are a game of luck. You can't control the outcome of a spin with the implementation of any slot strategies or hacks that exploit the games' bugs.

The best way to increase your chances to win at slots is to pick the games with the highest Return to Player, or RTP.

What is the RTP in slots?

The RTP (or Return to Player) is a number expressed in percentage that indicates the amount of money wagered that an individual online slot machine is going to pay back in the long term.

When you pick an online slot with high RTP, you know that the game is going to pay out a percentage of the money you bet more often than a game with a low RTP.

The best online slots have an RTP of at least 96%. Finding the highest RTP slots to play online is not always easy as most slots sites prefer to give more exposure to games with a lower percentage.

So, how do you find the highest RTP slots to play online?

Easy. You pick one of the UK slots sites in the list below and use their welcome bonus to get some free spins.

Some of them will give you also a £10 no deposit slot bonus to try some of their games. Whenever this happens, grab the bonus with hesitation and play. When you do so, please remember to gamble responsibly.

Important. The fact a high RTP slot machine features a payout of 96% or more doesn't mean you'll win at online slots every time you play.

The RTP indicates 'theoretical' payouts. The frequency of when a slot machine pays depends on numerous additional factors that can also affect the payout amount.

The most important factors that influence how a slot machine pays and how much money you could win are:

  • The betting limit
  • The multipliers
  • The bonus rounds / free spins
  • The number of active paylines
  • The game's variance

When you do your research to pick a slot machine with more winning chances than others, make sure you don't just stop at the RPT but you also 'study' the game to learn all the factors you need.

The UK slot sites in the list, including some of the newest Thunderkick slots casinos, have high RTP slots for real money and are some of the best in the industry when it comes to payouts.

These sites have implemented special processes to help you keep what you win and withdraw the money from your account should you wish to do so.

Low Wagering Requirement Bonuses on Slots

The key to enjoying spinning the reels of the best slots online is to have enough credits to play. That doesn't mean you need to spend too much to finance your games - it's quite the opposite, in fact.

If you don't want to spend on slot machines — demo versions or casino bonuses are the answer.

Most UK casinos online have bonuses, but not all of them are great to play slots — especially when they come with wagering requirements that make it almost impossible for you to keep what you win.

Players love the 10 deposit slots bonuses available right after registration on some famous casino websites. When you claim your bonus - whether it's a 10 free no deposit bonus or some free spins on Starburst, it doesn't matter - make sure you check the wagering requirements.

What are the Wagering Requirements?

The wagering requirements express the number of time you need to wager the amount of your bonus before you are entitled to withdraw the money you won playing with the bonus money.

With the list that follows you have direct access to all the online slot sites with the lowest wagering requirements in the United Kingdom. If you want to play online slots with bonuses, these are your best options right now.

Did you notice how this list doesn't include any of those massive £10,000 free bonus or 100 free spins bonuses you find on some casino sites?

Anyone with a bit of experience in gambling knows those are not good offers because they come with insane wagering requirements or terms and conditions build to prevent you from withdrawing the money you might win on online slots.

If you don't know how to read the terms and conditions or you are still not sure you know how to spot a good bonus offer, start from this principle: do not take bonuses with wagering requirements of 50x or more.

Bonuses with 30x or 40x wagering requirements are much easier to complete (30x is pretty much the industry standard these days) - as long as the terms and conditions give you enough time to play and meet the requirements.

Casinos with low wagering requirements include brands that offer 10x or 20x bonuses. These are the best offers for those looking for fun and want to play the best online slots without too many complications.

UK Slot Sites with No Wagering Requirements

A small number of slot sites have bonuses that perfect to play real money online slots. These are the sites that offer free spins with no wagering requirements.

The amount of free spins usually connects with the amount of your first deposit (the more you deposits, the better). Once you have the free spins, you can play slots to have an opportunity to win real money prizes and withdraw what you win with no additional requirements to meet.

These bonuses work for a limited amount of time, so make sure you always check the bonus validity to know when it will expire.

Most of the casinos that offer bonuses with no wagering requirements give you free spins to play a limited number of online slots.

When you play, always check the RTP of the games included in the free spins offer. The best online slots are those with the highest RTP.

Some £5 deposit slots sites are known to run wager-free promotions a few times a year. If you see any of those sites included on the list above, take it.

Best Sites for Slot Tournaments in the UK

Multiplayer online slot tournaments are one of the hottest and most exciting things in gambling these days.

When you register for a slot tournament you:

  • Compete with other players
  • Play for a share of a global prize pool
  • Get do discover some of the very best online slots in the UK

Playing a slot tournament is easy. You can either pay an entry fee (buy-in) or register for free (freeroll slot tournament) to enter.

Once you are in, you have a limited amount of time to spin the reels to win the most money or accumulate the most credits / points. When the time is up, all the players who got enough points to sit on the paid places of the tournament leaderboard take a prize.

When you play online slots, the prizes on tap can range from real money to free spins, special bonuses, and free entries into more expensive events.

All the casinos in the list offer both free online slot tournaments and events with a buy-in fee. If you are ready to play your first slot tournament online, register on one of these sites and start from the freerolls.

The prizes in slot tournaments are always connected with the nature and the type of the event. Freerolls tend to have the smallest cash prizes (they are free, after all!).

Buy-in tournaments can have a set prize pool or be of the 'progressive' kind. The real money prizes to win on progressive slot machine tournaments online grow every time a new player joins the competition.

The Best 25 UK Online Slots to Win Real Money

Play all these slot machine games for free and for real money. It's up to you to decide if you want to play the demo version with free (virtual) money or jump on the real thing right away.

You need to register to access the games.. The registration is free (choose your nickname, enter your email, and play) and is always connected to a welcome bonus.

Don't forget that t&cs apply on every bonus you use. From the free spins you get on signup to the match bonus you receive as you download a casino app, you are likely to have wagering requirements or other conditions that apply to your winnings.

The 25 best online slots in the UK are:

1.Call of the Valkyries97.1%GO TO GAME 
2.Vikings96.05%GO TO GAME 
3.Age of the Gods: Mighty Midas96.34%GO TO GAME 
4.Justice League96.33%GO TO GAME 
5.Glory and Britannia95.94%GO TO GAME 
6.The Great Reveal97.5%GO TO GAME 
7.Starburst96.1%GO TO GAME 
8.Book of Oz95.5%GO TO GAME 
9.Wild-o-Tron 300096.01%GO TO GAME 
10.Showdown Saloon96.05%GO TO GAME 
11.Solar Disc96.01%GO TO GAME 
12.Who Wants to Be a Millionaire96.24%GO TO GAME 
13.Siberian Storm94.26%GO TO GAME 
14.Galactic Streak95.95%GO TO GAME 
15.Monopoly 250K95.39%GO TO GAME 
16.The Nutcracker95.97%GO TO GAME 
17.Luminous Life94.44%GO TO GAME 
18.5 Ninjas95.2%GO TO GAME 
19.El Jackpotto96.00%GO TO GAME 
20.88 Fortunes96.00%GO TO GAME 
21.Treasure Fair94.82%GO TO GAME 
22.Double Stacks96.10%GO TO GAME 
23.White Rabbit Megaways97.72%GO TO GAME 
24.Asgardian Stones96.31%GO TO GAME 
25.Wheel of Fortune on Tour96.6%GO TO GAME 

Call of the Valkyries

Call of the Valkyries is a game to play if you want online Slots with a welcome bonus in the UK


For an adventure across an ancient Norse landscape, look no further than Call of the Valkyries.

This online slots game for UK players is a quest wherein you, as a Valkyrie, are tasked with recruiting the best warriors in all of Norway and taking them to Valhalla.

This 5-reel, 25-payline slot game is simple to get the hang of Watch out for bonus features which add wilds and free spins.

There's even a Call of the Valkyrie pick your prize round for those lucky enough to unlock it. The 97.1% RTP isn't too shabby, either.


Vikings is one of the best online slots to win in the UK


Can't get enough of the northern landscape? Vikings is definitely one of the slot machine games for UK players who love their history channel.

That's because this game follows the famous television show almost to the T.

NetEnt really did their homework on this 5x7 soon-to-be-classic. It features an RTP of 96.05% and 243 ways to win, which goes up as you progress through different modes.

During Raid Spin mode, you'll have 78,215 ways to win. Welcome to Valhalla.

Age of the Gods: Mighty Midas

On Age of the Gods You can strike a big win as an UK Player


Playtech wants to bring us back to ancient Greece with this King Midas-themed online slots game, and they're doing a pretty good job.

With 5 reels and 3 rows, there are ample chances for your touch to emulate that of the fabled king.

Fun Greek graphics and an RTP of 96.34% serve to transport you back in time, making Age of the Gods: Mighty Midas A must-play for mythology buffs.

Justice League

Justice League is one of the best online Slots in the UK with a no deposit bonus


Everyone's favorite heroes are back at it again with Justice League, one of the best slots online today.

Wonder Woman, Batman, Superman, and even Aquaman star in this action-packed UK slots game.

Expect the kind of game that Playtech is good at. High variance, good graphics, and an RTP of 96.33% all serve to help make Justice League an interesting progressive slot for superhero fans.

Glory and Britannia

Glory and Britannia is an online slot for UK Mobile Casinos


If you're all about medieval Britain, Glory and Britannia could be one of the best UK online slots for you.

Expect lots of jousting and a nod to classic British folklore—characters like Robin Hood, King Arthur, and Guinevere all make an appearance in the game.

High quality graphics and cute animations dot the game, which regales your ears with the sound of the lute as you progress.

The Great Reveal

The great reveal is one of the best new online Slots in the UK


The Great Reveal is among the best magic-themed slot games of all time.

The five reels spin hypnotically as a colorful cast of roses, rabbits, magic hats, girly wilds and other retro magic paraphernalia align along the 3 rows to bring you 40 possible paylines.

With an RTP of 97.5%, this game does have potential. More than that, it offers unique graphics and a theme you don't see every day.


If you gamble responsibly, Starburst is better than Rainbow Riches


Travelling at warp speeds through space while a dazzling display of alien jewels avails you isn't just a possibility with Starburst from NetEnt, it's a guarantee.

5 reels and 3 rows spin rapidly to bring you the flashy arcade-game feel of days gone by, and a spacey soundtrack (plus an RTP of 96.1%) provide even more incentive to play.

Book of Oz

Book of Oz games provide infinite fun with the respin feature


Microgaming has managed to throw together the best Wizard of Oz-themed online slots game in the UK.

Surprise surprise, you'll be seeing a lot of green come out as you journey across this magical landscape towards Emerald City.

10 paylines might be less than you're used to, but the game does have its fair share of bonus features—you need only 3 wilds to trigger the bonus game, and the RTP is slightly above average at 95.5%.

Wild-o-Tron 3000

Play the Wild O Tron 3000 Slot Safely and Securely from the United Kingdom


The name might make you laugh, but Wild-o-Tron 3000 is a good slot. It also offers a unique theme based in a 1660s robot laboratory with elements of sci-fi.

You'll spin 5 reels and 3 rows to (hopefully) get in on the 40 paylines. NetEnt has created a simple and extremely playable masterpiece here.

Expect to see robotic favourites like Wall-e and other rusty friends.

Showdown Saloon

Showdown Saloon is like House of Doom - but better


We've been searching for a good wild west game for a while now, and Showdown Saloon delivers on all fronts.

With 5 reels, 3 rows, and 24 paylines available (plus an RTP of 96.05%), the game offers plenty of opportunities.

However, the real draw here is the fun theme. Whiskey, cowboys, pistols, poker chips, and other western-themed icons adorn the screen while western music makes everything a bit more exciting.

Solar Disk

Solar Disc is a great online Casino Slot for mobile devices


If you're playing slots online for the (difficult) propect win real money, this is a game you might want to consider.

The Ancient Aztec-themed Solar Disk slots game can help you out with that.

The game is surprisingly historically accurate, displaying the god of war Huitzilopotchli and a number of Aztec symbols.

If you're into that sort of thing, you'll find here animal symbols like jaguars, bears, and of course, the famous Aztec solar disk.

Six reels, four rows, 26 fixed paylines, and a 96.01% RTP definitely put something on the menu with this game.

Who Wants to Be a Millionaire

Insert your username or email address to play Who Wants to be a Millionaire from the UK


This UK slots game is themed after the famous American game show.

It's a progressive jackpot with 50 paylines and an RTP of 96.24%.

The background is based on the game, with themes like the phone a friend, ask the audience, and 50-50 all being incorporated.

Who Wants to Be a Millionaire is a highly volatile game with a lot of potential.

Siberian Storm

Siberian Storm Mobile Slot


If you're an animal lover, this is one of the best online slots in UK for you.

Siberian Storm has super-high volatility, and it's nothing short of majestic.

The Siberian tiger theme adds class and style, while the shades of snowy white colouring give you a feel for the game's namesake land.

This game has 5 reels, 720 paylines, and an RTP of 94.26%. When you get five 'eye of the tiger' symbols, you have the chance to win up to 200 free spins.

Galactic Streak

Go for the max bonus on Galactic streak - it's the best part of playing online Slots


If you're searching for an out-of-this-world online slots experience to play from the United Kingdom, Galactic Streak might be the slot machine for you.

This slot game definitely has a few tricks up its sleeve. 4 reels and 4 rows might not be what you're used to, but 20 paylines more than makeup for that.

With an RTP of 95.95% and tons of astronomic symbols, space buffs will love it. The game has a simple layout with colours reminiscent of towering nebulas and smouldering suns.

It also has tons of spacey wilds and multipliers, some of which are programmed to stay in place the entire round!

Monopoly 250K

Want to play great video Slots? Try Monopoly 250k!


Based on the popular board game, this online slots game will make you nostalgic for long-gone game nights.

Interesting concepts within the game include Monopoly-themed bonus rounds like the Railroad Bonus Game and the Mr. Monopoly Wild.

With an RTP of 95.39%, what's not to love?

The Nutcracker

The nutcracker online video Slot is a lot better than the average fruit machine you can play in the United Kingdom


In the true holiday spirit, iSoftBet has recently given us The Nutcracker —but just because the holidays are over, that doesn't mean you can't still play this awesome game.

Based on the famous wintertime play, The Nutcracker delivers with trains, teddy bears, sugar plums, and an RTP of 95.97%.

None of the other casino slots has the ability to instil a sense of Christmas spirit like this one.

Luminous Life

Luminous Life UK Slot 2020


If you've ever wanted to explore the ocean floor, now's your chance. You can dive deep down under the waves with the Luminous Life online slots game, searching for glowing underwater creatures and collecting their corresponding prizes.

Watch out for the glowing W (the wilds symbol) and the Luminous Re-spin feature, which gets triggered every time you hit a winning combo.

5 Ninjas

Top UK Slots: 5 Ninjas


If you're an aspiring martial artist, you'll love the 5 Ninjas slot game from Eyecon.

This exciting and fast-paced game is full of swords, fighting ninjas, and coins. You won't have a dull moment—5 reels, 3 rows, and 25 ways to win will captivate you for hours.

This game has an RTP of 95.2% and is packed full of extra spins rounds and bonus features.

El Jackpotto

Play UK Slots to win Cash with El Jackpotto


One of the most action-packed online slots UK has on offer, El Jackpotto also has one of the most interesting storylines.

You'll follow the tale of Senor Burrito, a burrito vendor who moonlights as a fighter, as you spin the reels in this 5x3 grid.

Watch out for his squirting sauces, which have the power to land you free spins, wild symbols, mystery prizes, and even bonus game rounds.

With 20 paylines and an RTP of 96%, you'll have plenty of chances to laugh as you play.

88 Fortunes

88fortunes classic slot


This Chinese-themed powerhouse of a game is absolutely stuffed with activity—the similarities with other slot games end with the 5X3 grid.

There are 243 ways to win, and four jackpots.

Gold symbols abound and have the potential to multiply your winnings by up to 2,272.

The 96% RTP definitely adds to the excitement.

Treasure Fair

Treasure Fair Online Slot


The Treasure Fair theme is one of the cleverest of all the UK slots online, but it's not for the faint of heart—this creepy take on the funfair of every child's dreams is controlled by a dark overseer and his comical pet monkey.

Double Stacks

Double Stacks Online Slot


Double Stacks is the closest you can get to Vegas without actually flying there.

This 5-reel, 3-row game has 10 paylines and a many bonus features set among classic Vegas symbols like cherries, diamonds, sevens, bars, bells, and more.

You could get double the value of your symbol with the Double Stack feature, which offers free spins. This game is simple, with great graphics and an RTP of 96.10%.

White Rabbit Megaways

White Rabbit Megaways Spins on Starburst


Want to follow Alice down the rabbit hole? White Rabbit Megaways is your key to doing that.

This fantastical online slots game combines all the characters you've grown to love—the queens, the rabbit, the Cheshire Cat, Mad Hatter, and more—with 248,832 possible paylines across 5 reels and a RTP of 97.72%.

Land a white rabbit on the second, third, and fourth reels to activate the free spins feature.

Watch out for the Caterpillar, who comes out every once in a while to give you free wilds.

Asgardian Stones

Asgardian Stones Play Responsibly


Asgardian Stones is a Norse-themed online slots game. The layout of the game is simple, with 5 reels and 3 rows, along with a standard 20 paylines.

The abundance of special features (and the RTP of 96.31%) make it great.

NetEnt doesn't disappoint with their Avalanche feature, which rains down new symbols on the reels whenever you hit a winning combo.

Wheel of Fortune on Tour

Wheel of Fortune on Tour table game responsible gaming


Want to take a vacation to the United States? Well, now you...sort of...can with Wheel of Fortune on Tour.

This 5X3, 30-payline slot game will spirit you away to famous American sites while you spin the reels. Special features take time to unlock. An RTP of 96.6% sweetens the deal.

The On Tour bonus feature will give you the mileage you need to get free spins, extra wilds, and chances to win top prizes. The Level Up feature is now one of IGT's staples, allowing you to unlock further features as time goes on.

Online Slots FAQs

How to play online slots?

On this page, you find links to play all the most popular online slots in the UK. When you register, you can play the games for free in demo mode or you can try to win real money.

Both versions work the same. To play slots you need to:

  1. Set the limit of your bet
  2. Hit the 'Spin' button
  3. Wait until the reels stop and show you a combination of tiles

In nearly all the most popular slot machines, winning combinations are calculated from left to right.

What online slots pay real money?

All the slot machine games on this list are available for real money play. All the 20 online slots listed here pay real money prizes.

You need to be 18 (or older) to play at an online casino in the UK and that you should never play more than you can afford to.

If you need help to understand when to stop - visit this page on the BeGambleAware official website.

What are the best online slots to play?

This page lists all the most popular UK online slots, so these are all great games.

When you look for the best slots to play, always look at the RTP. Only play slot machines with an RTP higher than 96%. These are the games where you get more chances to win.

What bonuses can I get to play slots?

All the UK slots sites listed on this guide offer promotions to play slots. Some of them give you free spins or real money on your first deposit, others let you play with a free £10 no deposit bonus or more.

Whenever you play online slots with free spins or a bonus, check the wagering requirements. The best bonuses are those with no wagering requirements.

The promotion presented on this page was available at the time of writing. With some Casino promotions changing on daily basis, we suggest you to check on the site if it still available. Also, please do not forget to read the terms and conditions in full before you accept a bonus.
  • Play the best online slots for UK players in 2020 with the largest welcome bonus packages.

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