Best UK Online Slots | Our Guide for Players – June 2025

Louis Hecq

Last updated: June 18, 2025 - 11 min read

UK online slots give residents over the age 18 the chance to play online slots games. These games come from online casino operators from all around the world. We recommend sticking to casino operators who are licensed and registered by the UK Gambling Commission.

The main advantage of playing slots online is that you can access them from anywhere, whether it be at home or on-the-go. You will also be able to play more slot games than a land-based casino, with thousands of titles available on-demand.

Nowadays, UK online slot sites are very mobile compatible, with most operators offering mobile apps for free download. You will also find updated slots collections that add new titles on a regular basis.

To learn more about betting on slots in the UK, including our picks for the best UK slot sites for 2025, check out our full review below.

Best UK Online Slots Games in 2025

After carefully evaluating a wide selection of slot games available to UK-Based players, we were able to form our list of the Best UK Slots for 2025. Criteria taken into consideration when we were reviewing slot games include their Return to Player (RTP), Volatility, Max Win, Bonus Features, Aesthetics/Gameplay and Mobile Compatibility. 

Top-Rated UK Online Slots Games – Our Picks

Best Slot Sites For UK Players

We scoured the internet in search of the best slot sites offered to players from the UK and were able to cut the competition down to 4 operators. So without any further ado, here are our picks for the Best Slot Sites in the UK for 2025.

BetMGM 

Despite being new to the UK online gambling industry, we found BetMGM to have one of the most complete slots betting sections in the region. Our research discovered over 2000 slot titles available at the operator, which included video slots, classic slots, progressive slots, jackpot slots, and MEGAWAYS. 

A vast majority of the slot games we found come from top game studios like NetEnt, Blueprint Gaming, Play’n GO, Rabcat Games, Big Time Gaming and Pragmatic Play.

We came across a Slots Welcome Offer which provides 100 Free Spins on the Big Bass Splash slot to new customers who bet £10 or more at the Casino. (T&Cs Apply)

Mr Vegas

If you’re looking for a sheer number of slot games, we think Mr Vegas might be the choice for you, with over 6000 different casino titles available. We found almost every bonus feature you could think of, including Random Wilds, Re-spins, Progressive Jackpots and Megaways. 

The one major issue we came across at Mr Vegas was that the platform was not available on a dedicated mobile app. Mobile players can only access the site on the optimized mobile browser site.

The Welcome Bonus at Mr Vegas provides a 100% first deposit bonus of up to £200 with a wagering requirement of 35x the bonus amount. (T&Cs Apply)

LeoVegas

Award-winning online casino LeoVegas has built a reputation as one of the best slot operators in the world and it’s easy to see why. We found the brand to host over 3000 slot titles which included a number of popular exclusives like LeoVegas 10000X Gold, Bellagio Diamonds and Star Supreme. 

LeoVegas won the ‘Online Gaming Operator of the Year’ at the International Gaming Awards 2022 and ‘Best Mobile Casino Product’ at the EGR Operator Awards 2022. Since then the site has continued to improve and is consistently upping their game in the slots section.

We found a Welcome Bonus of 50 Free Spins on Big Bass Splash up for grabs for new customers are LeoVegas, which could be a great way to get started. (T&Cs Apply)

Jackpot City

As you might’ve guessed by their name, Jackpot City is known for their jackpot slots which have the potential for massive payouts. We did however find a variety of other popular slot types available, including Megaways, Link and Wins and Cash Collects. Evolution Gaming, Pragmatic Play, NetEnt and Red Tiger are just a few of the top slot providers we discovered on the site.

Be sure to take advantage of the Jackpot City Welcome Offer if you join, offering a 100% match up to £100 on your first deposit + 100 Free Spins on the Gold Blitz slot game. (T&Cs Apply)

Ladbrokes & bet365 Slot Games

The table below provides a side-by-side comparison of Ladbrokes and bet365, considered two of the largest and most popular online gambling operators in the UK. 

bet365 or Ladbrokes?

The Ladbrokes Games Slots section was found to have over 1800 titles, featuring some of the top game providers in the industry like Pragmatic Play, NetEnt, and Playtech. We also came across 51 different exclusive slot games which can only be found at their site, including Lock O’ The Irish, Devil’s Lucky Spins and Bees N’ Honey.

In our experience, bet365 had a similar size slots section to that of Ladbrokes, with around 2000 titles, and also has loads of top software suppliers like Pragmatic Play, NetEnt, ELK Studios and Play ‘n GO. We found a bigger exclusive section than at Ladbrokes, with over 130 originals like Savannah Bonanza, Gold Mine, Big Bait Gold.

The Casino Welcome Bonus at Ladbrokes gives new players the chance to get £30 Casino Bonus money when they make bets of £10 or more. Bet365, on the other hand, provides up to 20 Free Spins per day for 10 days after you register for a new account.

We were able to download mobile apps from both operators on Android and iOS, both featuring a sleek layout and access to all slot titles. Each operator is also available via mobile browser, optimized to all mobile devices.

How to Choose the Best UK Online Slots Site

• Licensed by UK Gambling Commission
• Welcome Bonus
• Variety of Slots
• Payments Options
• Mobile Compatibility
• Customer Support

In order to wisely choose an online slots game site, here’s the list of criteria we always use:

• Licensing- Always make sure that real money slot sites are licensed by proper gambling authorities like the UK Gambling Commission to ensure fair and secure gameplay.

• Welcome Bonus- Compare Welcome Bonuses with special attention on the wagering requirements must be fulfilled to claim the offer and withdraw bonus funds. We recommend looking for reviews of the best free bets offers which include Free Spins on slot games.

• Range of Slot Games- Take a look at the number of slot games available and the different types of slot genres. We think it’s also important to check the game providers, taking special consideration to top game studios like NetEnt, Microgaming and Pragmatic Play.

• Payment Options- Examine the safety and convenience of the available payment options for both deposits and withdrawals. Take into account any fees charged, processing times and max/min limits.

• Mobile Compatibility- Check which slots games are available on the operator’s mobile site and if they have a mobile app on iOS or Android. It’s always a good idea to read through customer reviews from the App store.

• Customer Support- Look into what customer support options are available for assistance at the slot sites and how long the waiting times are for responses. We also suggest looking through FAQ sections for answers to commonly asked questions.

Play Free Slots Games in the UK

We recommend trying out free slots games in the UK before switching to real money. Free slots give you the chance to try out a game and test out features without having to risk any actual cash. They are generally played with a free virtual currency which holds no real value. 

We ran into many online casinos which provided demo versions of their games available for free-play without even having to register. The demo versions sometimes don’t have all the features and jackpots, so you may not be able to get a complete experience of the slot game.

Some of our picks for the best sites where you can find free slot games to play are: Casino Guru, Slot Catalog and Slots Temple. Each of these sites have thousands upon thousands of slot games to try out, many of which you will bump into at popular real money slot sites.

Playing Slots For Real Money

Real money slots give you the chance to win actual cash unlike with free-to-play slots. We also found that they unlock more special features and jackpots than when a game is played in a free demo version.

A key advantage we noticed for real money slots games is the eligibility for bonuses and rewards. Many of the best betting sites have welcome offers, recurring promos and loyalty programs which give out prizes for real money slot play. 

To start playing slots for real money you will first need to register at an online casino operator of your choice and make a first deposit. In many cases, making a qualifying first deposit and/or applying a promo code could help you get your hands on a Welcome Bonus. We recommend checking the ‘PROMOTIONS’ section of a slot sites before registering to make sure you don’t miss out.

To start playing slot games you can find the game you want to play in the ‘SLOTS’ section and click on it. The game should load on your screen with your real money balance available.

If you’d like to limit your gambling, we found that most top UK online slot sites have deposit/loss limits which can be set daily, weekly or monthly. We recommend using bankroll management to keep your bets within a specific range based on your risk profile. An average range is around 1-2 per cent of your total bankroll per spin to prevent fast losses.

Mobile Slots & Payment By Phone

In our experience, almost all of the best online casinos give users the opportunity to play online casino slot machine games via mobile. Mobile slots games can be accessed either via mobile apps or through mobile friendly browser-based clients. Mobile sites are generally optimized to all devices, regardless if your operating system is iOS or Android.

The Pay By Phone payment option was found at select UK online slot sites, allowing customers to deposit via their mobile phone bill or prepaid balance. We think this is ideal for players who want to make instant and secure payments without having to divulge their bank or card details. 

The one big downside we came across with Pay By Phone is that it is limited to deposits. Withdrawals cannot be made through the option, so you will need to find another method from getting money out of the site.

A popular mobile payments solution we encountered and can recommend is Boku, which offers both Pay By Phone and Pay By SMS options.

Check our best British betting sites if you want to learn more about UK online betting.

Best Online Slots in UK FAQ

What are the best UK online slot games right now?

Based on our research, our picks for the best casino slot machine games in the UK are: 

• Gonzo’s Quest (NetEnt)
• Big Bass Bonanza (Pragmatic Play)
• Starburst (NetEnt)
• Book of Dead (Play’n GO)
• Bonanza Megaways (Big Time Gaming)
• Money Train (Relax Gaming)

Can I win real money from free slot games?

While in general free slots games to play do not provide real money winnings, we did find exceptions. Many popular UK online slot sites were found to provide Free Spins which give players the chance to win real money without having to risk any cash.

Are mobile phone deposit slots safe?

In our experience, mobile phone deposit slots came out safe in the UK, requiring SMS confirmation as an added layer of security before funds are transferred. 

What slot sites support Pay By Phone?

We ran into a number of UK online slots operators which support Pay By Phone payments. Our picks for the best mobile payment slot sites are Ladbrokes, Bally Casino and Betrino Casino.

Are bet365 and Ladbrokes good for slot games?

Yes, based on our review of the operators, bet365 Slots and Ladbrokes Games Slots both have a good variety of slots and promotional incentives which can give you the chance to try out real money online slots games for free.