Find the top-rated slot sites and the best online slots, expertly reviewed and ranked by our slot specialists.
Our comprehensive UK slots guide covers everything you need to know - from game types and mechanics to key features, themes and the latest slot bonuses.
With hundreds of slot websites in the UK, our experts - led by Paul Twaddle - have carefully selected the best ones based on key criteria:
For huge progressive jackpots, three UK online slot sites stand out for their impressive selection of progressive jackpot slot games:
Mr Vegas boasts an impressive selection of jackpot slots, including WowPot games like the atmospheric Wheel of Wishes and a variety of Mega Moolah titles. You will also find a fantastic range of Dream Drop progressive slots, with the immersive Temple Tumble 2 standing out as a fan favourite.
Key Features: Enjoy three exclusive ‘Wheel of Vegas’ slot jackpots and ‘Rainbow Fridays’ - weekly cash rewards based on your previous week’s slots play.
Unibet offers an impressive collection of 150+ progressive jackpot slots, including popular WowPot titles like the mystical Sisters of Oz and Mega Moolah favourites, such as the charming and quirky Moley Moolah. Their selection also features Dream Drop progressive slots, with the gritty Wild West-themed Money Train Origins standing out as a highlight.
Key Features: Enjoy an incredibly user-friendly slot lobby and take part in the exciting weekly £10k Lucky Spin Riders tournaments.
BetMGM hosts plenty of progressive jackpot slot games, including WowPot, Mega Moolah, Dream Drop and Jackpot King titles - with the iconic The Goonies standing out as a personal favourite.
Exclusive to BetMGM are the thrilling MGM Millions games, where classic slots like Starburst feature a ‘mega’ progressive jackpot, which currently stands in excess of £26 million.
Key Features: BetMGM’s exclusive MGM Millions games let you chase massive jackpots on classic slots that are not available as progressive games elsewhere.
Megaways slots are among the most popular formats, offering countless ways to win on every spin.
Here are our top three picks for the best Megaways slot websites in the UK:
With more than 150 Megaways slots, PartyCasino offers an impressive variety of options. Popular titles include the enchanting Madame Destiny Megaways and the playful The Dog House Megaways, both part of Pragmatic Play’s ‘Drops & Wins’ promotion, featuring random prize drops.
Key Features: Spin the ‘Party Prizes MEGA Wheel’ for guaranteed daily rewards, and join regular opt-in slots tournaments with exciting prizes up for grabs.
Regal Wins is another top UK slot site, offering hundreds of Megaways slot games. Their collection includes classics like the action-packed Bonanza Megaways and jackpot favourites, such as the iconic Gonzo's Quest Megaways.
Key Features: Enjoy daily, weekly and monthly slots promotions, plus earn loyalty points with every spin - redeemable for cash bonuses.
Named ‘Slots Operator of the Year’ in both 2023 and 2024, PlayOJO offers an incredible library of 250+ Megaways titles, including jackpot favourites like Cash ‘N Riches WowPot Megaways.
Key Features: Enjoy the UK’s largest collection of Megaways slots and get money back on every spin with their innovative ‘OJOplus’ feature.
Many slot websites offer regular promotions and bonus spins in order to extend your gameplay or reward your loyalty.
Here are the top UK slot promotions for April 2025, as selected by our slot experts:
At LeoVegas, UK players can claim 50 free spins on the classic Big Bass Splash. They also offer regular free spin promotions and exciting competitions for slot players.
Key Features: Enjoy exclusive Mini, Minor, Major and Mega jackpots on hundreds of slots marked with the ‘LeoJackpot’ badge, with progressive contributions shared across the LeoVegas network.
MrQ offers 200 free spins on the fun Irish-themed Fishin' Bigger Pots of Gold. These free spins come with no wagering requirements and are available exclusively using the promo code - POTS200.
Key Features: The ‘Daily Roulette Drop’ promotion rewards players who deposited £10 the previous week with free spin prizes.
New players can claim 50 free spins on the iconic Rich Wilde and the Book of Dead. After that, existing players can make a one-time minimum deposit of £50 to receive 520 free spins throughout the year.
Key Features: Enjoy the exclusive ‘Prize Twister’ promo, where randomly selected players can win free spins, scratch cards and cash prizes.
With new slot sites launching all the time, we are keen to highlight the ones that stand out based on key factors like game variety, bonuses and overall player experience:
Mega Riches features an impressive collection of 5,500+ slot games, offering a perfect mix of classic favourites, exciting new releases and a variety of jackpot slots. With more than 100 Megaways titles too, their vast library ensures you will find virtually any game you are looking for!
Key Features: Enjoy a guaranteed cash reward every Friday based on total spins from the past week - the more you bet, the bigger your ‘WinBooster’ will be. Plus, any winnings come with no wagering requirements attached.
Offering roughly 2,000 slots, Pub Casino offers a diverse mix of slot games, with a strong focus on jackpot titles. This includes games from popular progressive jackpots like Jackpot King, Mega Moolah and WowPot, where a huge jackpot win could be just a spin away.
Key Features: Enjoy regular slot tournaments where players can compete for bonuses and cash prizes.
Casiku offers 3,000+ slots, from classic titles to the latest releases. With their eye-catching collection offering everything from high volatility slots to thrilling jackpot games, you can explore a wide range of themes and features at this exciting new casino.
Key Features: Enjoy 20 free spins on Rise of Olympus every Tuesday with the ‘Turbo Spin Tuesdays’ bonus.
The best UK slots sites offer exciting sign-up bonuses, including free spins, along with regular promotions and rewards for loyal players. These slot bonuses provide players with great opportunities to explore a variety of casino games.
These sites feature a diverse selection of slot games with unique themes, high-quality graphics and immersive gameplay, all from top software providers. You will also find the latest releases and the biggest jackpots, offering huge winning potential.
When reviewing slot sites, we ensure they are licensed and regulated by the UK Gambling Commission (UKGC), which guarantees fair play, secure transactions and a safe gaming experience. We also look for sites with responsive customer support and a range of reliable payment methods.
The first online slots available in the UK were simple, typically played across five reels and three rows. These classic slot machines often had straightforward gameplay with a single payline, offering basic fruit symbols or bars. The first online video slot to introduce a bonus round, Reel 'Em In, was launched in 1996, marking a major milestone in the evolution of online slots.
Nowadays, players can play thousands of different slot games, offering diverse formats, themes and advanced game mechanics. Modern online slots often feature more than the traditional five reels, with some even utilising hundreds of paylines or dynamic ways to win.
These slots are inspired by traditional pub fruit machines, which appeared in pubs and arcades before transitioning to online casinos. They typically feature a very simple setup and are played across three or five reels, with simple graphics and nostalgic sound effects.
A prime example of this game type is Reel King, a beloved fruit machine slot that made a successful transition from physical pub machines to online slot sites.
While NetEnt’s Gonzo’s Quest is considered a modern classic, purists often refer to classic slots as games like IGT’s Da Vinci Diamonds.
Megaways slots use a dynamic reel system, where the number of symbols on each reel changes with every spin, resulting in a varying number of paylines.
With up to 117,649 ways to win on a single spin and a cost per spin starting as low as 10p, it is easy to see the appeal of this exciting Megaways mechanic.
Games like Fishin’ Frenzy Megaways demonstrates how this innovative feature can be seamlessly integrated into popular UK online slots.
Offering a unique blend of slots and bingo, Slingo lets players spin a slot reel to generate numbers, which are marked off a traditional bingo-style grid.
The aim of the game is to complete winning lines (known as Slingos) to move up the prize ladder. With each Slingo you complete, you move closer to the top prize, with some games offering extra features, including wilds, multipliers and free spins to boost your chances of winning.
Combining the fast-paced action of slots with the simple thrill of bingo creates a fun, hybrid gaming experience.
Today, software developers are increasingly focused on creating high volatile slots, offering players the chance for larger but less frequent wins.
Hacksaw Gaming, in particular, is renowned for their extremely volatile online slots, with popular titles like Wanted Dead or A Wild. These games provide a true all-or-nothing experience, emphasising high-risk, high-reward gameplay.
Many seasoned slot players have yet to hit the ‘max win’ on one of the highest-paying slots.
NetEnt was the first to break the 100k barrier with Dead or Alive 2, offering a maximum payout of 111,111x your stake. They later surpassed this with the release of Starburst XXXtreme, which offers a 200,000 max payout.
However, Nolimit City’s Tombstone RIP now tops the charts with an unprecedented 300,000 max payout, which was first hit shortly after its release in 2022.
Such massive potential wins are among the reasons why Nolimit City slots have become a favourite for many UK players.
Progressive jackpot slots offer players the chance to win a substantial fortune, with each bet contributing a small portion to a continually growing jackpot.
There are various progressive jackpot pools that link games from the same software provider, with the jackpot continuing to increase until one lucky player lands the win.
Once the jackpot is won, it resets to a seed value and begins growing again.
Below, we highlight the largest online slot network jackpots currently available, along with the best UK slots sites where you can play them.
The biggest online progressive jackpot payouts have primarily come from the WowPot and Mega Moolah series of slot games.
Microgaming launched the safari-themed Mega Moolah progressive jackpot slot in 2006 to much acclaim. In 2015, it paid out a £13.2 million jackpot to British soldier Jonathan Heywood, from a minimum 25p stake.
Since its release, Mega Moolah has expanded into a series of titles that all contribute to the same jackpot, including Absolootly Mad, which paid out the largest Mega Moolah jackpot of £16.9 million in April 2021.
That massive win came just two weeks after a WowPot jackpot of £15.2 million was won by a UK slots player on the Book of Atem online slot.
However, WowPot regained its crown with a world-record online slots jackpot win of £33 million, won in late 2023 on the aptly named Wheel of Wishes.
While the slots mentioned above contribute to shared network jackpot pools, the following are standalone games with their own progressive jackpots:
These individual slot games can still pay out staggering jackpots, including the €17.9 million won on Mega Fortune by a Finnish player.
UK players have also claimed impressive jackpots, such as £6.3 million on Hall of Gods, £6.2 million on Jackpot Giant, £6.2 million on Jackpot Giant and £5.1 million on Beach Life.
While the big progressive jackpots can take weeks or even months to drop, there are also jackpot slots that are guaranteed to pay out every day.
Sometimes referred to as ‘Daily Drop’, ‘Must Drop’ or ‘Must Win’, these progressive daily jackpots ensure a big winner every 24 hours.
At top slot sites like PlayOJO, players can watch the countdown in the games lobby to see when the daily jackpot ‘must drop’, allowing them to play just before the jackpot time limit is up.
Here are some of our favourite daily jackpot slots:
Online slot games come in an endless variety of themes, ensuring there is something for everyone at the best online casinos. We have picked out the most common themes below, along with our top picks from each category.
Kitty Glitter is a glamorous slot that combines sparkling jewels with playful feline fun. With its dazzling symbols, free spins bonus and the chance to win big, this charming game offers an exciting experience for players who enjoy a mix of luxury and feline-themed adventures.
The Dog House Megaways is a popular slot that expands on the original game with the exciting Megaways mechanic. Featuring playful pups, eye-catching graphics and up to 117,649 ways to win, the real highlight is the free spins bonus, where a choice between Sticky or Raining Wilds can deliver mega payouts.
Irish-themed slots are a beloved staple at online casinos, filled with lucky charms, leprechauns and pots of gold. With vibrant visuals and plenty of exciting features, these games promise lots of fun as you chase the luck of the Irish.
This slot from Gameburger Studio, which uses the same game engine as their other hit slot ‘9 Masks of Fire’, offers a charming Irish quest, with catchy tunes and vibrant symbols such as rainbows and pots of gold. Trigger the free spins bonus round to receive a 3x multiplier with the possibility of unlimited retriggers, while landing nine scatters wins you the jackpot.
The most iconic Irish-themed slot, this cult game brings this theme to life with iconic symbols, leprechauns, pots of gold and plenty of rainbows. With three different bonus rounds available, - Pots of Gold, Road to Riches and Wishing Wells - there are multiple ways to win big.
Fishing-themed slots have quickly become one of the most popular trends in the slots world. Titles like Fishin' Frenzy and Big Bass Bonanza have taken the industry by storm, each spawning numerous sequels that keep players hooked. With their enduring popularity, you can expect to see fishing slots all over your favourite online casinos for years to come!
Back to where players' fascination with fishing slots began, Fishin’ Frenzy is a classic slot game that has captivated players for decades. Offering simple visuals, a rewarding free spins bonus and the chance to hook some big wins, the simplicity of this original game has been built on with dozens of sequels.
The original game in the hugely popular fishing series, Big Bass Bonanza reels in players with fun gameplay and a rewarding bonus round, which features a ladder trail that can lead to extra free spins and increased multipliers. Pair that with vibrant graphics and a catchy soundtrack and it’s easy to see why this slot has become such an industry favourite.
Pirate-themed slots invite players to set sail on thrilling adventures in search of hidden treasures. Packed with swashbuckling characters, treasure maps and stormy seas, these games offer exciting gameplay and plenty of chances to uncover bountiful rewards on the high seas.
Hollywood-style cinematography gives you high expectations for this 2021 release from Relax Gaming - and it certainly doesn’t disappoint. A rewarding Coin Feature brings the base game to life, while the Trail Bonus offers incredible wins of up to 50,000x!
Considered a slots classic by many seasoned players, this Novomatic release offers a 50/50 gamble feature after each win. It also gives you the chance to infinitely re-trigger more free spins during the bonus round, which is complemented by a 4x multiplier.
While most slot games fit into popular theme categories, there are many cult favourites that don’t easily fall into these verticals. With that in mind, we’d like to pick out a few of our all-time favourite classic slot games that stand out for their timeless appeal and unique charm.
Launched back in 2013, the brilliantly simple slot from NetEnt is without doubt the most played online slot game ever. There isn’t a traditional bonus feature, instead the key to big wins lies in the expanding Starburst Wild symbols, which remain sticky while triggering one or two re-spins. This unique game feature has contributed to the game’s enduring popularity.
Themed around the Yukon trail, Bonanza was responsible for a flurry of similar themed slot releases - all of which were literally trying to jump on the gold rush bandwagon. Smooth gameplay is complemented by a quirky soundtrack and plenty of ‘yee-haws’ when you land a big win on this Big Time Gaming slot.
Rich Wilde and the Book of Dead is a popular Egyptian-themed slot game by Play’n GO. Featuring a five-reel, 10-payline setup, it follows adventurer Rich Wilde as he uncovers ancient treasures. With expanding symbols and free spins, this high volatility slot offers thrilling gameplay and a maximum win of 5,000x.
This legendary release from NetEnt is a five-reel, 20-payline slot featuring an adventurous conquistador searching for El Dorado. It introduced the Avalanche feature, where cascading symbols replace wins, increasing multipliers up to 5x in the base game and 15x in Free Falls. A medium-high volatility slot, it offers edge-of-your-seat gameplay.
I love the nostalgic feel of this Blueprint slot, based on Spielberg’s 1980’s cult classic film where you can join Mikey, Chunk and the gang as you hunt for One-Eyed Willy’s treasure. Fans will instantly recognise iconic moments like the ‘Hey you guys’ intro from the toothless Sloth and with randomly awarded bonus features during the base game, plus the potential of landing the ‘red’ Super Bonus and No Lose gamble, this ranks among my all-time favourite slots.
While the basic concept of most UK online slots remains the same, many offer a unique mix of game mechanics and features that influence gameplay and potential winnings.
Here, our slot experts summarise the main characteristics of online slot games:
When you fire up any online slot, the first thing you will encounter is the base game, which presents the standard reel configuration and symbols for that particular slot.
A quick glance at the information section will reveal the paytable, displaying the value of each symbol and the payouts for winning combinations. The base game is usually straightforward - you simply choose your bet size and start spinning.
The bet size, also known as the spin value, allows you to customise your play and tailor your wagers to fit your budget. While the way it is calculated can vary between slot games, it will typically include the following elements:
Most slots require a minimum of three matching symbols to form a win, although some pay for just two of the highest-paying symbols.
Traditionally, winning combinations are formed by matching symbols on adjacent reels, with the default payout direction being left to right. However, innovation has introduced several interesting game mechanics, including:
While the base game may deliver more frequent wins, it is the bonus round that unlocks premium symbols with the largest multipliers for the biggest payouts.
The bonus round is typically triggered when you land three or more Scatter symbols - awarding free spins along with enhanced features and multipliers, such as:
Slots tournaments add a competitive edge to spinning the reels, offering additional rewards beyond regular gameplay.
In these scheduled tournaments, players compete against each other for cash prizes or other exciting rewards.
While each tournament has its own set of rules, the goal is always the same - accumulate points to move up the leaderboard.
Here, we list the tournaments currently available at UK slot sites:
The most popular slots tournaments in the UK are Drops & Wins, available exclusively on Pragmatic Play slots.
With a monthly prize pool of £2 million, this promotion offers prize-paying positions on weekly tournament leaderboards, plus random daily prize drops:
Our UK online slots team especially enjoys the random daily prize drops, which gives everyone who plays a chance to win - not just those who make it onto the weekly leaderboard.
The UK Gambling Commission (UKGC) recently introduced changes to UK slot regulations in order to promote responsible gambling among online slot players.
This legislation saw the removal of features that could speed up play or give the illusion of control over the outcome of an online slot game. For example, Auto Play and Quick Spin features are no longer permitted, which should help players to remain engaged and mindful of their spending with each spin.
The UKGC has also prohibited Bonus Buys and Feature Buys for UK players. These options had allowed players to purchase immediate access to a game's bonus features at a greatly inflated cost, which potentially encouraged excessive spending.
Additionally, from 9th April 2025, new stake limits have been introduced for online slots in the UK, capping maximum bets at £5 per spin for players aged 25 and over, and £2 per spin for players aged 18 to 24.
The aim of these new regulations is to reduce the risk of players losing money too quickly and impulsively. UK players are always encouraged to play responsibly and stay within their means when playing online slots in the UK.
The world of online slots offers endless choices, from captivating themes and innovative features to massive jackpots and unique variations like Slingo. Whatever your preference, there's certainly something for everyone.
Based on our extensive research, including player feedback and expert industry insight, we have highlighted not only the best slot sites in the UK, but also the top-rated online slot games currently available.
But don't just take our word for it - explore the wide range of UK online slot bonuses and promotions available for you to claim. From weclome bonuses to free spins and reload offers, these promotions give you a great opportunity to try out new games and find your favourites without risking too much of your own money.
As you enjoy your favourite UK slot games, always gamble responsibly. Set spend limits, take regular breaks and play within your means.
Yes - you can win real money on UK slots at UKGC-licensed sites listed on this page. These casinos use random number generators (RNG), ensuring fair and regulated gameplay, allowing players to potentially win real money through a variety of exciting slot games.
For the best payouts, Mr Vegas and PartyCasino stand out as two of the top UK slot sites. Both are renowned for offering a wide selection of high RTP (Return to Player) slots, which significantly enhance your chances of winning.
The best UK slots can be found at the top slot casinos listed on this page. These sites offer an extensive selection of games from renowned software developers, ensuring high-quality graphics, engaging gameplay and a wide variety of themes and features.
Yes - all online slots at UK slot sites recommended on this page are fully accessible on mobile. Each of these sites offers either a dedicated mobile app or a mobile-optimised version of their website, ensuring seamless gameplay across a variety of devices.
You can discover a wide variety of slot games at all the top UK online slots sites. These include classic slots, video slots, progressive jackpots and themed slots, catering to a diverse range of interests and gaming preferences. If you prefer a more competitive experience, you will also find exciting slot tournaments available.
Yes - we only recommend UK slot sites that are licensed and regulated by the UK Gambling Commission (UKGC). These slots UK sites are audited for fairness and security, ensuring you have a safe and reliable gaming experience whenever you visit them.
UK slot sites offer a huge variety of slots, including classic fruit machines, video slots, progressive jackpots, 3D slots and Slingo. Many slots UK sites also feature themed games based on movies, TV shows, and popular culture, providing something for every type of player.
Classic slots usually have three reels and simpler gameplay, often featuring traditional symbols like fruits, bars and sevens. Video slots, on the other hand, have five or more reels, advanced graphics, intricate bonus features and themed gameplay that can include free spins, multipliers and wilds.