Best slot sites in the UK: Top online slots casinos in 2025

ONLINE SLOTS are experiencing a major boom in popularity in the UK. With a seemingly never-ending conveyor belt of slot sites to choose from, how are you supposed to know which ones are worth signing-up for?

That’s where we step in. Our dedicated team of online casino experts have years of experience in the industry and have played at all of the best online casinos in the UK.

In this guide to the best slot sites, we have narrowed down our best picks for you which have a popular selection of slot games from top software providers and provide the best gaming experience. We also looked at what offers and payment options are most suited for slot players.

Using our detailed Flying Eze Factor rating system, we have managed to select the top 10 best slots currently available to players in the UK, highlighting what makes them stand out, as well as any bonuses that might be worth claiming.

Our team of casino experts adhere to a strict set of criteria when reviewing an online casino, assigning ratings in several categories to create an overall score for the operator.

When assigning these scores, our writers are encouraged to share their personal experience with a website and provide an honest analysis of the site’s pros and cons and their opinion on whether you should sign up for the site.

A closer look at the top 10 best slot sites

1. VideoSlots

• Number of slots: 8,000+
• Number of software providers: 130+
• Exclusive slots: No
• Payout options: Visa/Mastercard, Skrill, Neteller, Apple Pay, Trusty, PayPal, PaysafeCard, Bank Transfer
• Slot tournaments: Yes

Unsurprisingly, a casino called VideoSlots puts a real emphasis on its slot selection, with the bulk of its 9,000-strong game catalogue being dominated by its slot portfolio, which has over 8,000 titles. Players can easily flick through the slots on offer thanks to an incredibly intuitive website design and filtering systems.

The list of providers working with the operator reads like an industry directory, with big hitters like Pragmatic Play, Play’n Go, and Nolimit rubbing shoulders with smaller studios like Pear Fiction, Neon Valley, and Nailed It Games. In short, there is something for everyone here.

One of my favourite features is the ‘Battle of Slots’ tournament, which is advertised as the world’s first multiplayer slot tournament experience. It allows you to compete for some huge prizes in a selection of different formats.

All of this, as well as an excellent welcome bonus which provides 100% on first deposits up to £200 and a great customer experience, makes VideoSlots our number 1 choice.

2. Duelz

• Number of slots: 1,000+
• Number of software providers: 50+
• Exclusive slots: Yes
• Payout options: Visa/Mastercard, Skrill, Neteller, Apple Pay, Trustly, PayPal, PaysafeCard, Bank Transfer, MuchBetter
• Slot tournaments: Yes

While Duelz might not boast the same number of online slots as some of the other operators on this list, there is still more than enough here to keep players engaged, and the site more than makes up for it in other areas.

For me, one of the most attractive features of the site is its unique fantasy theme, which ties in nicely with a selection of bonuses and some excellent tournaments and promotions. Duelz Cash Tournaments allow players to win £1,500 daily, which is a huge selling point. It also has a welcome bonus worth £100 and 100 free spins.

In terms of slots, there are also exclusive titles available here, including hits like Duelz 3×1. I would also recommend checking out the slot’s jackpot and Megaways selection, with the operator serving up games with huge winning potential.

3. Casimba

• Number of slots: 2,600+
• Number of software providers: 90+
• Exclusive slots: Yes
• Payout options: Visa/Mastercard, Skrill, Apple Pay, Trusty, PayPal PaysafeCard, Bank Transfer
• Slot tournaments: Yes

Casimba is one of my favourite slot sites in the UK. The operator serves up a catalogue of over 2,600 titles, with titles from some of the most creative developers in the industry, including the likes of Relax Gaming and Nolimit City, with titles like Money Train 4 and Tombstone Slaughter serving up huge wins and brilliant bonus features.

While the bonus selection here is slightly limited compared to some other top UK slot sites, I have found that Casimba likes to run limited-time tournaments, most of which are leaderboard-based and last a week.

It also serves up a generous welcome bonus, with up to £200 up for grabs, as well as 50 free spins.

4. Mr Vegas

• Number of slots: 8,000+
• Number of software providers: 180+
• Exclusive slots: No
• Payout options: Visa/Mastercard, PayPal, Neteller, Skrill, Bank Transfer
• Slot tournaments: Yes

Do not be fooled by Mr Vegas’s slightly aged design; this site has plenty to offer online casino lovers. The operator boasts a catalogue with over 8,000 titles, making it one of this list's most stacked online slot sites. If you can think of any online slot game, you will probably find it at Mr Vegas.

I also loved the wager-free welcome spins that were offered to new customers and the 100% bonus up to £200. The operator also runs regular tournaments, with players able to get their hands on big cash prizes.

As I briefly alluded to, the only issue with Mr Vegas is the aged website design, which can make using the site feel a little difficult at times, especially when transitioning to smaller windows or screen sizes.

5. 32Red

• Number of slots: 2,000+
• Number of software providers: 55+
• Exclusive slots: No
• Payout options: Visa, Mastercard, Bank Transfer, Payz, Trustly
• Slot tournaments: Yes

Another big name on the market that lives up to its reputation is 32Red. The operator has over 2,000 slots to choose from from established developers like Games Global and Pragmatic Play. As well as this, the operator also runs regular tournaments and promotions for slot lovers, giving players a chance to significantly enhance their experience. However, I have found that the wagering requirements on 32Red promotions tend to veer towards the higher-end, so this is something players should be aware of.

Aside from this, though, there is very little to complain about here. I would also highly recommend checking out the exclusive section, especially if you’re a fan of British reality TV and game-shows, with hits like The Cube, Tipping Point, and I’m a Celeb all being brought to life on the reels.

6. Betrino

• Number of slots: 2,300+
• Number of software providers: 55+
• Exclusive slots: No
• Payout options: Visa/Mastercard, PayPal, PayViaPhone, Apple Pay, Instant Transfer, PaysafeCard, Payz, Neteller
• Slot tournaments: No

While Betrino’s name makes it sound like the slot is only focused on sports betting, let me assure you, that is not the case. In fact, I was pleasantly surprised at how well-balanced this site was, with an equal selection of bonuses and promotions available for both sports bettors and casinos. That said, a few casino-based tournaments would definitely enhance the site.

The site is nicely organised, and the slot selection is easy to look through. I found a good mix of slots from the usual big hitters like Pragmatic Play and NetEnt and some offerings from smaller studios like Iron Dog Studios and Jelly. Overall, I was impressed with what was on offer at Betrino, and with over 2,300 games to choose from, it is unlikely that players will get bored anytime soon.

One issue players should be aware of is that the operator does charge a 1% fee on withdrawals up to a maximum of £3. While this might

7. NetBet

• Number of slots: 4,000+
• Number of software providers: 90+
• Exclusive slots: No
• Payout options: Mastercard, Visa, PayPal, PaysafeCard, Trustly, Payz, Apple Pay, Google Pay
• Slot tournaments: Yes

NetBet is another casino that has emerged as one of my favourites in recent years. The filtering options and general usability of its website make this one of the best slot sites. The site is organised into numerous subcategories, each of which can help you find a game to suit your needs.

I’m also a big fan of the jackpots on offer at NetBet. These include Relax Gaming’s Dream Drop series, as well as other big network progressives.

The site has a healthy selection of bonuses and promotions that are updated regularly, as well as a welcome bonus that offers 500 free spins. Likewise, it offers weekly and monthly tournaments with big prizes up for grabs.

8. Unibet

• Number of slots: 4,200+
• Number of software providers: 100+
• Exclusive slots: No
• Payout options: Mastercard, Visa, PayPal, PaysafeCard, Trustly, Payz, Apple Pay, Google Pay
• Slot tournaments: Yes

Unibet is a name that I instantly associate with quality, and when you scroll through the online casino, it’s easy to see why.

For me, the site scores highly across the board. It has over 4,200 games from some of the biggest hitters in the industry, with popular modern hits like Pirots 3 and San Quentin 2 being offered alongside classic hits like Book of Dead and Bonanza Megaways.

You won’t be surprised to find out that a brand as well-established as Unibet also has one of the best exclusive sections on the market, including custom-made titles by Pragmatic Play, Pear Fiction Studios, and Relax Gaming.

I am also a big fan of its crash-game selection, with top titles like Skyliner and Aviator providing players with some thrilling instant-win action.

If you are a new player at Unibet, you can deposit £10 and get £40 in bonuses to enjoy.

9. Barz Casino

• Number of slots: 2,600+
• Number of software providers: 100+
• Exclusive slots: No
• Payout options: Visa, Mastercard, PayPal, Skrill, Neteller, PaysafeCard, Apple Pay, MuchBetter
• Slot tournaments: No

Barz Casino is an operator that I have recently discovered. It caught my eye straight away thanks to its unique rock-inspired theme and its extremely generous welcome bonus, which gives out a deposit bonus of £300.

The site is more than just a welcome bonus and a stylish interface, though. It has over 2,000 slots to choose from, working alongside some of the biggest names in the industry. Personal favourites like Hacksaw Gaming, Relax and Stakelogic are all present and correct, as are all of the big hitters.

The only area we would like to see the site improve is its number of tournaments and promotions, with the operator only running a selection of lottery-style bonuses when we reviewed it.

10. RedAxePlay

• Number of slots: 2,000+
• Number of software providers: 55+
• Exclusive slots: No
• Payout options: Visa/Mastercard, PayPal, PayViaPhone, Apple Pay, Instant Transfer, PaysafeCard, Payz, Neteller
• Slot tournaments: No

RedAxePlay is another new slots site I was introduced to this year, and I must say, I’ve been impressed with almost everything it offers. The site has a really slick design, making jumping between the different slot sections nice and smooth. There was a healthy range of video slots, jackpot titles, and Megaways, with the operator not missing out on any big names.

Unfortunately, one aspect about the casino I was not as fond of was the withdrawal options, with the site charging a 1% fee up to £3. While this is not a huge amount, it is still more than most top slot sites, which do not charge anything.

sTARTER FOR TEN

The best online casinos for free spins and bonuses from £10 deposits

RATED

Best online casinos: Top casino sites in the UK

How we rank slot sites

To ensure we are only highlighting the best slot sites in the UK, our expert team follows strict criteria for all their online casino reviews. The following are the most important factors we consider when recommending slot sites:

• Selection of slot games: Of course, the selection of slot games is an absolutely crucial element when choosing which slot sites to recommend. While having a high number of slots to choose from is great, it's also not the main factor as much as the quality of the titles on offer, keeping up with new releases, and ensuring a range of different types of slots offered, including classic slots, Megaways, jackpot slots, and more.
• Top quality software providers: We want to see the best of the best when we are deciding which online casinos to recommend. Top slot providers like Pragmatic Play, Play’n Go, Nolimit City, and others are always going to be big green flags for us, and we will always highlight operators that work alongside top-tier providers.
• Theme and type variety: While we all love a good Egyptian or Irish-themed slot, we can all agree that far too many are instantly forgettable. When looking through a casino lobby, we want to see a wide range of different themes and genres to ensure a little bit of something to keep everybody entertained.
• Slot RTP: The RTP is one of the most important metrics for players when deciding whether they will play at an online casino. When analysing the best slot sites, we will check the RTP of its top games to ensure it has an attractive range for players.
• Free spins and bonuses: No modern online slot site is complete without a strong selection of bonuses and free spins. When reviewing online casinos, we will always check through the bonuses on offer, making sure to check through their terms & conditions to ensure they are offering players the best possible experience.
• Convenient payment methods: We favour casinos that have a variety of payment methods to pick from. Besides debit cards, we want to see casino having access to e-wallets, prepaid options (such as PaysafeCard), and pay-by-mobile options.
• Responsible gambling: One of the most important factors when reviewing an online casino is its responsible gambling resources. All of the casinos you will find reviewed in this guide are licensed by the UKGC and, as such, are required to offer players the chance to set deposit limits on their account. We also like to see operators go above and beyond in this field, offering additional support to players when it is needed.

FREE SPINS

Get 100 free spins when you register and stake £10 with BetMGM's casino bonus

CASI-YES

Best casino apps: Top 10 mobile casinos in the UK (2025)

Best slot site bonuses for UK players

Online bonuses are an absolutely essential part of the modern online slot experience. You will run into all sorts of different bonuses at UK casinos. The following are the most common:

• Free spins are one of the most popular bonus types you will find at a UK online casino. These do as they say on the tin, providing players with the chance to enjoy some of their favourite slots using free spins.
• No deposit bonuses: For many casino players, myself included, no deposit bonuses are the cream of the crop of casino bonuses. As their name suggests, these provide players with a bonus to use without the need to deposit their cash. What’s not to like? While no-deposit bonuses don’t tend to be as big as other bonus types, they are still an exact way to get a taste of what a casino offers at no cost to yourself.
• Reload bonuses will see an operator match a player’s deposit with additional bonus funds. For example, a player might deposit £20 and get £10 as a reload bonus.
• Cashback bonuses: are typically rewarded based on a player’s losses. These will reward a certain percentage of your losses back to you as bonus funds. Typically, these are based on losses accumulated over a period of time.
• Welcome bonuses are promotions that are specifically available to new customers, and they can be a combination of any of the above bonus types. For example, an online casino might offer new players a 100% deposit bonus of up to £100 and 50 free spins.
• Loyalty programs can come in all shapes and sizes, but they all follow the same principle: rewarding returning players with access to exclusive perks, bonuses, and rewards.

Types of online casino slot tournaments

One way that the best slot sites like to engage players is through slot tournaments. These are typically open for anyone to enter and will offer cash prizes or other prizes like free spins or bonuses. The following are the most popular types of tournaments you are likely to encounter:

Promotional and network tournaments: Promotional tournaments tend to be run by game developers to celebrate the launch of a new slot or series of slots. These may be network tournaments, which will be available across several casinos. The competition in these is intense, but the prizes are normally huge.

Free-to-play tournaments: Some top UK slot sites will run free-to-play tournaments to encourage players to test out games and to give them a chance to get their hands on some prizes. In some cases, cash prizes are on offer with these, but in most instances, players compete to reward bonuses or free spins. In some instances, there may be other real-world prizes on offer.

Scheduled tournaments: Scheduled tournaments operate for a limited time, with players needing to maximise their play during a selected window to stand a chance of winning. For example, a scheduled slot tournament might run from Monday to Friday, with players competing to land the biggest wins during that time across a leaderboard.

Survivor tournaments: Survivor tournaments are another popular tournament format where the players in the bottom places on a leaderboard at the end of a specific time window are limited. The longer you last, the more chance you have of getting your hands on some big prizes.

Most popular online slots among UK players

There are so many fantastic online slots out there that knowing which ones to play can be difficult. The following ten titles are the ones I believe are currently the most popular top UK slot sites.

Popular slot themes at online casinos

🎣 Fishing slots

Fishing-themed slots have reigned supreme over the industry since the turn of the decade. The launch of Pragmatic Play’s Big Bass Bonanza ushered in a new era for fishing slots, with developers incorporating cash and collect features into fishing-themed games and trying to find new ways to put a spin on the genre. Other popular hits include Razor Shark from Push Gaming and Fishin Frenzy Megaways from Blueprint Gaming.

🏹 Adventure slots

Those feeling slightly more adventurous should check out the best adventure-themed slots. This is a bit of an umbrella term, covering all slots involving some quest or adventure. Popular examples of the genre include NetEnt’s Gonzo Quest and ELK Studios’ Tahiti Gold.

⚔️ Viking slots

Vikings and Norse mythology have been everywhere in popular culture over the last decade, and slot games have been no different. The striking imagery related to the genre lends itself perfectly to the excitement of online slot games, and with such a rich culture and history to choose from, I do not anticipate this genre’s popularity dying down any time soon. Popular hits include Vikings Go Berzerk from Yggdrasil and the Vikings slot from NetEnt.

🏴‍☠️ Pirate slots

The swashbuckling world of pirates has become a popular theme among online slot players. It has been a theme that developers have fully embraced, finding creative spins to put on the genre, with the Pirots series from ELK Studios being one of the best examples of this. Other stand-out titles include Pirates Pub and Pirate Golden Age, both from Pragmatic Play.

🦁 Animals slots

Are you in the mood for some cute animal slot action? There are plenty of fantastic animal-themed slots available at top UK slot sites. Among the most popular titles are Pragmatic Play’s The Dog House and Red Tiger’s Piggy Riches Megaways.

👻 Horror slots

Who doesn’t like to be spooked every once in a while? While horror slots are not quite as ubiquitous as some other types in this best slot sites guide, plenty of brilliant ones are still out there. Hits like Serial and Mental from Nolimit City are excellent examples of how to get the theme right, while there are very few slots that are as popular as NetEnt’s Blood Suckers II.

🧝 Fantasy slots

Fantasy slots allow developers to get their creative hats on and attempt to conjure up some magic on the reels. The genre has produced some hugely popular titles, including Pragmatic Play’s Starlight Princess and NetEnt’s Divine Fortune.

🍒 Fruit slots

Despite all of the innovations in the online slot world, there is still plenty of room for the humble fruit-machine-inspired title. Many of them will use a classic slot set-up, reducing the number of bonus features and drawing players in with a healthy dose of nostalgia. Popular titles include Fruit Shop from NetEnt and Blazing Hot 7s from Light and Wonder.

🏜️ Egyptian slots

There are few slot themes that are as ubiquitous as Ancient Egypt. The grandiose luck, mythical beings, and sense of mystery have all proven to be a hit with players over the years, with popular titles like Book of Dead and Hand of Anubis being among the most-played slots at top online casinos.

🎅 Christmas slots

If you’re the kind of player who likes to get in the festive spirit, then Christmas-themed online slots will be for you. While these might not be popular all year round, they can be a great way to get you in the Christmas mood during the Winter months. Popular Christmas slots include Fat Santa from Push Gaming and Wonders of Christmas from NetEnt.

🎃 Halloween slots

Like Christmas slots, Halloween slots are only popular during their respective holiday period, but when November rolls around, you can’t move for pumpkins and spiders spinning around the reels. Halloween Jack from NetEnt, Reel Spooky King Megaways from Inspired Gaming, and Halloween Fortune from Playtech are some of the most popular titles in the genre.

🛸 Sci-fi slots

Sci-fi is a popular theme among slot players, with developers using this theme to transport players to other planets and galaxies on the hunt for big wins and exciting bonus features. Of course, the prime example of this slot is NetEnt’s iconic Starburst slot, which online casinos reguarly use as part of welcome bonuses and other offers.

☘️ Irish slots

Few nationalities are as synonymous with gambling and the concept of luck as the Irish. The beautiful imagery of Irish culture, the leprechaun, the pot of gold, and the rainbow, have all been utilised countless times by developers to serve up exciting slices of slot action. The Rainbow Riches series is one of the best examples of the popularity of the Irish theme.

🧑‍🎤 Pop culture slots

Pop culture, whether it be movies, TV or music, is a rich source of inspiration for online slot developers. Many brilliant slots are out there based on existing IPs, including The Goonies and Rick and Morty Megaways from Blueprint Gaming and Mega Fire Blaze: Breaking Bad from Playtech. Of course, live casino hits like Deal or No Deal and Monopoly Live also fall into this category.

Facts about online casinos and slots in the UK

The UK gambling industry is big business in the UK. Let’s look at some interesting stats and figures surrounding the industry and players.

• When it comes to popularity with players, online slots are a clear winner. Figures from the United Kingdom Gambling Commission show that in the year ending 2023, casino games generated a Gross Gambling Yield of £4 billion, with online slots accounting for £3.2 billion of that figure. (Gambling Commission)
• The average slot session lasts around 17 minutes according to figures from 2023, which is slightly down from previous years where it sat at 18. During this same time-period, there was an increase in the number of sessions lasted an hour or more. (Gambling Commission)
• The growth of the UK gambling market is not projected to slow down any time soon. Revenues are predicted to increase to £11.71 billion in 2025, with a projected figure growth of 3.13% by 2029 up to £13.25 billion. (Statista)
• The British government introduced a £2 minimum stake for all players under 25 in September 2024 in an attempt to control gambling harm. This came following the publication of the industry’s white paper in 2023. (GOV.UK)
• The UK has one of the most active gambling markets in the world, with recent data from Statista showing that there are approximately 36.43 active online gambling accounts in the UK. (Statista)

How we evaluate online casinos

Our dedicated online casino experts work tirelessly to ensure we provide the best online casino and sportsbook reviews. We follow strict criteria which allow us to rank casinos according to a number of different factors, including slot selection, bonuses, licensing and security, and more.

Several factors are 100% non-negotiable. This includes holding a UKGC license, having valid SSL encryption and data security, clear terms & conditions, and a robust selection of responsible gambling resources and tools.

Q&A about the best UK slot sites

If you are new to the world of online slots, then everyone can feel a little daunting. Fortunately, you’re probably not the only one with some questions, which is why we have compiled this list of the most frequently asked questions we receive.

1. What’s the most popular slot game in the UK?

While there are no official statistics on the de-facto most popular UK slot, several titles clearly lead the way. Pragmatic Play’s Big Bass Bonanza, Play’n Go’s Book of Dead, and NetEnt’s Starburst are going to be the clear frontrunners.

2. Which slot has the highest RTP?

The highest RTP slots on the internet include titles like NetEnt’s Blood Suckers, which has an RTP of 98%, or Madame Mystique Megaways, which sits at 98.03%. In general, any slot that has an RTP higher than 96% is going to be attractive to players.

3. Which slot site has the biggest selection of games?

VideoSlots and Mr Vegas are the two slot sites with the biggest selection of games available, with both operators boasting over 8,000 titles from some of the industry’s most respected developers.

4. Are there any bonuses for new players on slot sites?

Yes. All of the top UK slot sites we have explored in this guide offer welcome bonuses for new customers. As always, players should remember to read through the terms & conditions of any bonus before claiming it.

5. How do I choose a safe slot site?

All of the slot sites recommended in this guide are 100% safe to use. Players in the UK should only ever play at casinos that are licensed and regulated by the United Kingdom Gambling Commission (UKGC). This ensures players are protected and also indicates that an operator is up to speed with all of the latest industry standards regarding player safety and well-being.

Unlock even more award-winning articles as Flying Eze launches brand new membership programme –Sun Club.

About the author

James Anderson

James Anderson is a Betting & Gaming Writer at Flying Eze. He is an expert in sports betting and online casinos, and joined the company in November 2020 to work closely with leading bookmakers and online gaming companies to curate content in all areas of sports betting. He previously worked as a Digital Sports Reporter and Head of Live Blogs/Events at the Daily Express and Daily Star, covering football, cricket, snooker, F1 and horse racing.

Find James on LinkedIn