Best Online Slots UK in 2024

Slots are, without a doubt, the most popular online casino games in the UK and around the world. The simplicity of playing them, coupled with the high winnings, makes them the game of choice for many players from the UK. Consequently, you’ll find thousands of online casino slots featuring diverse themes, bonus features, and payouts.

You can also find hundreds of slot sites where you can play the best online slots for fun or real money. We have prepared a guide on how to locate the best UK slot sites, how to identify the best slot games, and what to consider when playing slots in the best UK online slots sites.

To help you locate the best bonus deals and sites that have a large variety of the best slots, we have included a list of our top slot sites below.

Best Online Slots Casinos 2024

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How to Identify the Best UK Slot Sites

Slots are the most popular online casino games, and that’s why many online casinos stock slot machines. However, without due diligence, you cannot distinguish the best UK slot sites from the hundreds of online sites that claim to be the best.

Here’s a guideline on how to identify the best UK slot site that is ideal for playing your favorite slot games. Some of the main features that you should look out for include:

Number and variety of slot games at the UK slot site

You need to sign up at a slot site that caters to your gaming needs. As such, you should sign up at a UK slot site that stocks all your favorite slot games and more.

The best UK slot sites should also have a good variety of games from multiple software providers. This allows you to access all the games under one roof instead of registering at multiple sites.

But number and variety alone are not enough. The UK online slots sites games should also be high quality and fair to achieve the gaming experience players are looking for.

The legitimacy of the UK online slot games site

Confirming that the online slot site is legitimate protects you from losing your funds while playing the best slots at the site. The best UK slot sites must have acquired licensing from the UK Gambling Commission and/or other relevant gambling agencies.

Size and quality of the slot bonuses

The best bonuses for slots should be beneficial to slot players. For instance, the best UK slots bonus should include many free spins and spins with a reasonable value. In the case of deposit bonuses, the bonus offer should include a high match percentage such as 100% or 200% matched to your deposit.

The maximum wins attached to the slots casino bonus should also be high to avoid having to forego most of your winnings. While claiming the slots bonus, it is also essential to consider the wagering requirements, especially game weightings. Slots should contribute 100% to meeting the wagering requirements.

But that’s not all. The bonus validity period is also curial. The UK slot site should give you enough time to complete the wagering requirements.

Transparency of the slot games RTPs

All slot games are developed with specific statistics, including the RTP (Return to Player) rate, which determines how much the slot game is expected to give the players.

The best UK slot site should transparently display information about the slot game RTP so you can choose games with favorable RTP rates.

Mobile gaming convenience

You should be able to gamble on the go on your mobile smartphone or tablet.

The best UK slot sites optimize their mobile casino slots, allowing players to wager on the games from wherever they are.

The best mobile UK slot sites should also be fully functional. That means you can make deposits, play on the go, and be able to withdraw your winnings from wherever you are on your mobile device.

Service Provision 

You need a UK slots site that caters to its players’ needs and gives them access to efficient services. The best UK slot sites should ensure that your funds are secure and that you can withdraw your winnings without any problem.

The UK slot site should also have convenient payment options and banking limits that suit your gaming needs. In addition to secure banking options, the UK online slots sites should also attend promptly to its customer complaints.

You should be able to access customer support services whenever you require them. And the site needs to have several options that make it easy to do so. This could be through telephone, live chat, or email options.

What Makes Online Slots Popular?

Slot machine games are some of the oldest and simplest games in the online casino games industry. To a large extent, they are games of chance, and both novices and experienced casino players can play. Their popularity also stems from their features which include:

They come in many varieties

There are thousands of online slots casinos that you can find at the best UK slots websites. The games come in many varieties, from branded slots to simple classic slots and video slots with sophisticated graphics and storylines.

The slots, developed by the many software developers, also come with unique features that differentiate them from others. For instance, Big Time Gaming’s Megaways or Betsoft’s 3D slots stand out from the regular slot games and contribute to breaking the monotony by getting you a variety of slots with unique features.

Slots may also be developed with diverse bonus features that include free spins, wilds, and jackpot prizes, among other features.

Slot games do not require prior skills of playing them as they are games of chance. To win, you simply have to match symbols across the reels.

Any player can quickly sign up, click on a slot, place wagers and get the reels moving. The gameplay is unlike poker or other games where you need to make decisions or count cards to influence the game’s outcome.

Slots are some of the best casino games where you can reap great rewards. For instance, slots that feature progressive jackpots such as Mega Moolah and Divine Fortune reward players with huge wins, rising to millions of pounds.

Players do not also have to place large wagers to win slots jackpots, unlike in some games.

Most online slots feature interesting storylines, animations, and sound effects. It is, therefore, possible to get an immersive gaming experience when you play online casino slots. The development of 3D slots and live slots has also made slot gaming more enjoyable.

You can get free spins from most casino promotions at the best slots websites to try out slot games. Free spins and slot bonuses are the most common bonus offers that you can get from many online casino sites. Therefore, it is easy to start your slot gaming adventure using free spins and free funds from the promotions.

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Best Online Slots UK

Most popular Online Slots at UK Casinos

Book Of Dead - online slot

Book of Dead

Gonzos Quest - online slot

Gonzo's Quest

Bonanza - online slot


Mega Moolah - online slot

Mega Moolah

Types of Online Casino Slots hosted in the Best Online Slot Sites

Slots are developed with a variety of features that differentiate them from each other. For instance, classic slots bear simple gameplay and symbols, while some slots feature multiple pay lines and many graphical features. Consequently, we can classify slot games into major clusters such as:

Branded Slots

Software developers have come up with entertaining slot games that follow a familiar theme from a Television program, films, music, or music band.

For instance, the Game of Thrones slot game follows the familiar theme in the Game of Thrones American drama series.  As a result, fans of the Game of Thrones TV series can identify some familiar aspects of the film in the accompanying music and symbols, enhancing their entertaining gaming session.

Other top branded slots include Rocky, Gladiator Road to Rome, The Black Knight, Sabaton, Wizard of Oz, Robocop, Rambo, Wonder Woman, Street Fighter 2, Jumanji, King Kong, and Jurassic Park.

Video Slots

These are the most common online casino slots hosted in most of the best UK online slots sites. Video slots are designed with diverse features that range from the number of pay lines and reels, symbols, bonus features, and themes. Popular video slots include Starburst, Tomb Raider slot machine, Gonzo’s Quest, Avalon 2, Wizard of Oz, Book of dead, and Thunderstruck 2.

Jackpot Slots

Some slot games in most of the best online slots sites feature a jackpot prize. The jackpot prize could be a fixed prize amount or a progressive jackpot where the prize amount keeps rising as more players keep playing the game. A good example is the popular Mega Moolah, a progressive jackpot where the prize keeps rising and can grow up to millions of pounds.

Classic Slots

These are simple slots that resemble the early slot machine games. They can be found on most of the best online slots sites. Classic slots have simple features and a few bonus features, and most are designed with 3 reels and a few pay lines instead of 5 reels found in many video slots.

Classic slots are also designed with familiar symbols such as bells, bars, and fruit symbols. Popular classic slots include Mega Joker, Jackpot 6000, Break Da Bank, and Triple Diamond.

Megaways Slots

These are new slots that operate on a unique pay mechanism. Each spin can turn up a random number of symbols on the reels, resulting in thousands of ways to win instead of the usual pay lines.

Many Megaways feature a maximum of 117,649 ways to win. Megaways slots may also feature more than 5 reels, in some cases bearing as many as 76 or 7 reels.

They also pay when you match symbols in adjacent reels, unlike the usual slots that usually pay from left to right. Popular Megaways include Bonanza, White Rabbit, Jammin Jars, and Gonzo’s Quest Megaways.

You can play Megaways slots at Big Time Gaming slot sites UK such as Play Ojo, 888 Casino, Betfair, and Leo Vegas casino.

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How do Slot Features Work?

Before playing online slots at the best slot sites UK, it is advisable to understand the main features and how to play slot games.

  • Symbols

Slot games have different symbols that determine how much you win in any spin. The different symbols bear different values, and your winnings are determined by how many symbols you match on the pay lines. Most slots award you a win when you match 3 or more symbols across the pay lines.

  • Paylines

These are the lines where winning symbols line up. They are used to determine whether you score a win or not.

Slot machines may have fixed or variable paylines, which you can bet on. In fixed pay lines, you have to wager on all the paylines, while in variable paylines, you have a choice on the number of pay lines to activate or bet on.

  • Autoplay feature

When playing slot games, you may manually spin the reels one after the other or use the Autoplay feature if it is provided.

The Autoplay button operates by spinning the reels automatically up to the specific number of spins you have chosen. You can choose from 10, 50, or 100 automatic spins, saving you time instead of clicking on the spin button.

Special Bonus Features

Online slots symbols

The best online slots have one or more bonus features that help to boost your overall payout in the game. Some of the primary bonus features are borne out of special symbols that include:


These are special symbols that can substitute regular symbols to help in completing winning combinations. For instance, if landing 3 matching symbols results in a win, and you land 2 matching symbols and a wild symbol, you can get a pay-out if the wild substitutes a symbol to the required matching symbol.

In most slots, wilds also have higher values than the regular symbols, and you stand to win a higher payout if you land many wilds on a spin. Wilds could be stacked; in which case they are clustered as 2 or more symbols.

Scatters or bonus symbols

These are special symbols that are usually the key to activating a bonus round. The scatter symbols pay from any position on the reels.

Scatter symbols are also important in activating bonus features. When you land 3 or more scatter symbols anywhere on the reels, you could be granted free spins

Jackpot feature

Some of the best slots UK have jackpot features attached to them. The jackpot amount could be a fixed prize that you can win when you land a combination of specific symbols. It could also be won when you complete a certain feat in the slot game.

Some slots feature a mini, minor, major, and grand jackpot prize.

In progressive jackpot slots, the prize keeps rising as a certain percentage of the bets placed on the game are pooled together and added to the prize. This can be found in popular slot games such as Mega Moolah and Divine Fortune.


Some slots have a multiplier feature that is attained when you land some special symbol combinations.

The multiplier might be fixed, or it might cumulatively increase as you hit more special combinations. The multiplier increases your winnings by multiplying the payout that you win in the spin or round.

Multipliers might be standalone, such as X5. In such a case, if you win £100, with a multiplier of X5, you end up with a payout of (100×5) or £500. They might also be a combination where getting a multiplier of X5 and X2 gets you a total multiplier of x7 on your pay-outs.

Gamble Feature

Some of the best UK slots give you a chance to gamble your pay-out to increase your overall win. If you make the correct prediction, the gamble feature may award you double or quadruple(x2 or x4) of your winnings.

However, you should note that it is risky, and you might end up losing all your prize if you make the wrong prediction. On the bright side, though, if you get a payout of, say, £500 and gamble correctly, you could end up with a total payout of (500×4) £2000.

Other major Slot Features – Slot Volatility and How it Affects Your Winnings

The volatility of an online slot determines the frequency of winning in the game and the maximum amount that you can win from the slot game. For instance, slots with high volatility tend to get you huge winnings, but the frequency of hitting the huge winnings is low.

You should also be ready to endure long periods of dry spins before you can hit the huge wins.

On the other hand, slots with low volatility tend to hit winnings more often, but the payouts are of lower amounts. Your choice of either low or highly volatile slots will determine how much you can win when you play the slot game at the best online slots site. Fortunately, the best slot sites UK host slots with all types of variance to suit your gaming needs.

Best UK Slots to Play for Real Money

The online casino industry is home to thousands of best UK slots with varying features. Therefore, it can be a bit overwhelming for a new player who is joining online casino gaming to identify the best slots to play.

From Mermaids Millions slots, Thunderstruck, Life of Brian slot, Irish Eyes, Starburst, or Tomb Raider slot, to a million other slots machines, it can be hard to settle on one, especially if you don’t have any information about them.  Below are some of the best UK online slots you can start with when you log in to the best UK slot sites.

Mega Moolah - online slot

1. Mega Moolah

The popular Mega Moolah is a progressive jackpot slot developed by Microgaming. The slot game, an African jungle-themed game, features a Mega jackpot, Major jackpot, Minor and mini jackpot, an RTP of 88.12 %, and low volatility. Its popularity stems from its huge jackpot wins, taking it to the Guinness Book of World records for the gigantic jackpots, which could rise to more than 18 million pounds.

Bonanza - online slot

2. Bonanza Megaways

It is Big Time Gaming's most popular slot game and among the first of the unique megaways slots. The slot game features 6 reels and the megaways pay mechanism where the maximum way to win for the game is 117, 649. The slot game can be played at most of the best UK slot sites, with players benefiting from its bonus features such as cascading reels, free spins, and unlimited multipliers.

starburst - online slot

3. Starburst

It is among the simple slots from NetEnt that is included in most UK casino free spins promotions. The game is presented with 10 pay lines and features the cosmos theme. The pay lines pay both ways, and the main feature is the Starburst wilds. The game has a high RTP of 96.1%.

Book Of Dead - online slot

4. Book of Dead

Egyptian-themed Book of Dead is among the most popular slots from Play n Go. The game is easy to play and comes with wilds, scatters, expanding symbols, and a free spins feature. It has a commendable RTP of 96.21% and is a high variance slot game.

Tomb rider - online slot

5. Tomb Raider

Tomb Raider is a Microgaming slot whose theme is inspired by the Tomb Raider film. Featuring an RTP of 96.56%, low volatility, the game is designed with special bonus features that include free spins, multipliers, and a pick and choose a game.

Gonzos Quest - online slot

6. Gonzo's Quest

Gonzo's Quest, which features an exploration theme, is among the most played slots from NetEnt. The slot game features the unique Avalanche Reels and Avalanche multipliers. The game has an RTP of 95.97%.

Best UK Slots Sites with No wagering or Low Wagering Bonus Requirement

Wagering requirements affect the amount of bonus you end up with, how much you spend to convert the bonus to cashable amounts, and the duration of time it takes you to convert your bonus to a credit balance.

The higher the wagering requirements, the harder it becomes to wager the bonus and convert it to cash.

For instance, wagering requirements of 50 times on a bonus of £100 means that you must wager £5000 on games before you can enjoy your bonus as a credit balance. On the other hand, wagering requirements of 20 times on the same bonus of £100 means that you only need £2000 to convert your bonus to a withdrawable bonus.

You, therefore, need to identify UK slot sites that offer you low wagering requirements on your bonus offers. Below are some of the top UK slot sites with low wagering requirements. Some of the best low wagering slots sites include:

Best No Wagering UK slot sites

UK Slot SiteNo Wagering Requirement
Play Ojo CasinoNo wagering on bonuses
Betfair CasinoNo wagering on free spins
All British casinoAlways 10% cashback no wagering
No Bonus casinoDaily 10% cashback, no wagering
Videoslots Casino11 wager free spins on first deposit

Best Low wagering UK slot sites

UK Slot SiteLow wagering requirement
Grosvenor Casino20X
Mr. Green Casino15X
Betfair Casino30X
All British Casino35X
Leo Vegas35X

Should I Play Free Slots Online?

With thousands of online slots casinos available in the best UK slot sites, it is impossible to gauge how each slot game works or pays out. However, you can practice playing the best casino slots at most online casino sites that stock slots on demo or free mode.

Alternatively, you can play some of the slots using the free spins bonuses offered at the best UK slot sites. You only have to create an account at a casino site and claim the no deposit sign up bonuses to play with free spins or free bonus funds.

Some of the best UK slots casinos where you can play slots using free spins and slots free play bonuses include:

  • Play Ojo Casino
  • 777 Casino
  • 888 Casino
  • Sky Vegas casino

Best Slots Sites UK for Mobile Gaming

The best online slots UK sites are dedicated to providing their players with convenient services and products. Players can therefore access gaming on the specific site while stationary and while on the move.

Most of the best online UK slot sites have optimized their games for mobile gaming, and players can access slots on their mobile smartphones or tablets. You can access most UK mobile slots on instant play on your mobile device’s web browser or through downloadable apps.

The best slots UK mobile gaming sites have appealing graphics, and the games are of high quality, just as they are on the desktop site. The mobile sites are easy to navigate, and most have game sorting features to enable players to easily locate their favorite games out of the large games list.

UK mobile sites are also secure and fully functional. Therefore, players can register accounts, claim bonuses and make payments on their mobile devices.

Below are some of the best mobile slots sites in the UK:

  • MFortune Casino
  • Leo Vegas Casino
  • 888 Casino
  • Play Ojo Casino
  • 777 Casino

Online Slots Tournaments- Are They Important?

Most online slot sites occasionally host slots tournaments on the new games that they have recently launched. Slots tournaments give you a chance to compete with other players to earn prizes in the slots tournaments.

Players collect points and climb the leaderboards to earn top prizes in the online slots promotions. The tournaments are a source of excitement and cash rewards for the lucky players.

Slots Payment Methods

To have an uneventful gaming experience, you should choose a site that has convenient payment options. This makes it easy to fund your account so that you can gamble spontaneously at the top slot sites.

The payment options should also enable you to withdraw your funds within reasonable time frames.

Some of the best payment methods at the top slot sites include:

  • Visa
  • Mastercard
  • Neteller
  • PayPal
  • Pay by Phone Bill
  • Skrill

However, you should first confirm whether the UK online slot site will award you a bonus if you make an initial deposit using Neteller or Skrill.

Online Slots Sites Software

The popularity of online casino slots has led to the development of thousands of online slots that cater to players with varying tastes and preferences in games.

There are tons of software developers and game studios who have taken it upon themselves to develop new gaming products in the slots industry. Consequently, the iGaming industry has also witnessed a high number of slot game developers over time.

The best UK slots sites stock slots from multiple software providers to satisfy their players’ needs for variety in slot games.

Some of the top online slots software providers include the veterans in the iGaming industry, such as:

  • Microgaming
  • Playtech
  • Real-Time Gaming
  • NetEnt

IGT, Novomatic, Play n Go and Big Time Gaming are some of the giants in the slot gaming industry. In addition to these, there are other notable software providers such as Red Tiger Gaming, WMS, Yggdrasil, Scientific Games, Merkur, NYX Gaming, Betsoft, and Eyecon.


It is among the pioneer software developers, having been established in 1994. The software provider is the power behind more than 500 of the best slots online games, led by its most famous progressive jackpot slot, Mega Moolah.

Microgaming slots are playable on the desktop and mobile platforms, where the high-quality graphics stand out.

Its most popular slots titles include:

  • Thunderstruck
  • Mermaids Millions
  • Lucky Leprechaun
  • Immortal Romance
  • Major Millions

On its branded slots category, you’ll find Game of Thrones, Tomb Raider, Jurassic Park, Gladiator, Bridesmaids, and Terminator 2.


It is among the giants in the UK slots iGaming industry, with its slots being part of the most played games in UK online slot sites. The slots games list from NetEnt includes popular video slots such as:

  • Gonzo’s Quest
  • Starburst
  • Jack Hammer
  • Twin Spin
  • Mega Joker
  • Mega Fortune.

The company is renowned for its highly entertaining animations and overall high graphics in its slot games. It is also home to some of the best, branded slots such as Jumanji, Dracula, Guns n Roses, Creature from the Black Lagoon, and Planet of the Apes. The company is responsible for the development of more than 200 of the best slots UK games.


Established in 1999, Playtech has also been an industry leader in providing the best slots UK games with original and high-quality graphics.

The software provider is popular with players who love DC Comics such as Superman, Gladiator, Robocop, and the Age of the Gods slots series.

Playtech is also the developer of top online slots such as:

  • Tiki Paradise
  • The Matrix
  • King Kong
  • Ugga Bugga.

Other Top UK Slots Software Providers

Play ‘N Go is also among the top UK slots software providers. It is responsible for top online slots, including the popular slot, Book of Dead, which is included in many free spins promotions. Its other top slots include Reactoonz, Rise of Olympus, and Star Joker.

Other software providers include IGT, the providers of the best casino slots such as Pixies of the Forest, Cleopatra, Monopoly, and Da Vinci Diamonds. Big Time Gaming also joins the list of the best online slots software providers for its originality in the Megaways slots, such as Bonanza, Monopoly Megaways, Extra Chilli, and Who Wants to Be a Millionaire Megaways.

Betsoft also deserves a place as a top software provider for its unique 3D slots such as Sugar Pop, Birds, Kawaii Kitty, Safari Sam 2, Wild Drops, Good Girl Bad Girl, and Monster Pop. WMS or Williams Interactive Studios, the developers of the popular Oktoberfest-themed Bier Haus slot game, is also among the best online casino slots software providers. Its games are available in the best slot sites UK.

Tips to Winning at Online Casino Slots

You can improve your chances of winning using clever strategies.

You should firstly, practice the games on demo mode before you can wager real money on the slot game.

You can also try playing the best UK online slots using the many free spins and bonuses offered at UK online casinos.

You should also play slots with high RTP rates and bet limits that are convenient to your budget. You can find the information on the RTP, variance, and other slot machine terms on the information and paytable of the specific online slot.

Don’t forget to check out the reviews of specific slot games. For instance, reading the Starburst slot review before playing the game can help you gauge how much you should spend on your wagers, and the expected returns should you win.

FAQ: UK Online Slots Casinos