Non-GamStop Casinos in the UK – TOP Casino Sites Not on GamStop in 2025

Non-GamStop casinos in the UK have been the perfect gaming destinations for thousands of Aussies since 2017 after the Senate passed the Interactive Gambling Amendment bill. The casinos operate with offshore licenses, meaning that users can play for real money without restrictions and breaking the law, even if you’re on the GamStop self-exclusion list.

However, we must admit that not all non-GamStop sites are worth signing up with. Some casinos have bad reputations, while others lack proper security measures. For that reason, we have done the heavy lifting for you by reviewing and ranking the best AU casinos not registered with GamStop. 

5 Top Slot Sites Not on Gamstop Reviewed

We have reviewed the top 5 non-GamStop online casinos on our list to help you make an informed decision. In our review, we have focused on important casino aspects such as game selection, casino bonuses, mobile gaming, and payment methods.

1. CasiGO

In an ocean of online options, this casino has made a big splash. Launched just this year, CasiGo is already our favourite non GamStop casino. Here’s why:

Game Selection (4.9/5)

CasiGO’s game library houses over 3,000 options, and it’s growing every day. To have gathered such a collection in less than a year is nothing short of incredible. More impressive still are the software providers partnered with CasiGO. We are talking iGaming industry heavy hitters the likes of Pragmatic Play, NetEnt, Play’n Go, and more. Of that 3,000-strong selection, 2,600 are slots, while the remainder cover the other casino essentials: every casino classic table game, and over 100 live dealer tables.

Bonus Value (4.6/5)

Brand new players on CasiGO earn 165 free spins just for depositing funds, and this bonus extends through to the 5th deposit. No need to break out your calculators; we’ve got you. This means a grand total of 825 free spins available to first-time players! And if that doesn’t pique your interest, CasiGO also offers daily promotions for loyal punters, including cashback and reload bonuses. 

Payment Methods (4.5/5)

Paying, playing and cashing out again is as easy and straightforward as it gets. CasiGo facilitates fast and secure transactions via Visa, Mastercard, PayPal, PaySafeCard, Skrill, Neteller & bank transfers. While traditional banking methods can be sluggish at any non GamStop casino, CasiGO processes e-wallet transactions in the blink of an eye. However, it is important to know that using Skrill and Neteller does prevent players from claiming bonus offers.

Customer Service (4.8/5)

CasiGo impressed us with its excellent customer service. Punters can get in touch with a helpful customer service team at all hours via email and 24/7 live chat. We found the team to be responsive and knowledgeable, confidently resolving all concerns thrown at them.

Mobile Usability (4.7/5)

CasiGO’s absolute commitment to customer satisfaction is abundantly evident in its user-friendly user interface. On desktop, smartphone or tablet CasiGO loads quickly, plays well, and looks great too. While a dedicated mobile app would be preferable for some, we never found ourselves wishing for anything different. Each and every element of the CasiGO platform is fully mobile-optimised for smooth and enjoyable gambling on the go.

Pros & Cons

Pros:

• Massive selection of over 3,000 games. 
• Free spins welcome bonus for Book of Dead slot.
• Numbers payment options and fast withdrawals.
• Brand new casino with modern features. 

Cons:

• No sportsbook

2. Betano

Betano stands out as one of the most versatile non GamStop casinos available in the UK. It’s a one-stop shop for all gambling purposes, combining sports betting, slots, and live casino games on one platform. 

Game Selection (4.8/5)

On Betano you’ll find an impressive library of over a thousand games, ranging from classic slots and table games to Slingo and live dealer gameshows. Industry giants like Novomatic, Playtech, and Evolution Gaming power the platform, guaranteeing only the highest quality games for Betano punters. 

Bonus Value (4.7/5)

As a bit of an all-rounder, Betano adopts a personalised approach to its welcome bonuses. Depending on player preferences, punters can select as their first bonus as either a £40 sports free bet OR a swag bag of free spins. We really appreciate this bespoke bonus idea, which allows jackpot-seeking Jacks of all trades to pick the bonus that best suits their needs. 

Payment Methods (4.5/5)

Nothing to shout about here, but certainly no complaints either. Betano offers plenty of banking options, from traditional debit cards and bank transfers to modern high-speed e-wallets like PayPal, Neteller, and Skrill. We found depositing easy and straightforward and cashing out fast and stress-free. What more could you ask for?

Customer Service (4.4/5)

On the positive side, Betano’s customer support team is good. They respond fast, and they obviously know their stuff. On the downside, customer service is limited, responding during office hours only. By now, we consider round-the-clock assistance to be the industry standard, especially from UKGC-licensed sites like Betano. There’s room for improvement here. 

Mobile Usability (4.6/5)

Betano’s well designed user interface is easy to use and easy on the eyes, too. Better yet, every aspect of the platform is fully mobile-optimised, making for convenient gaming wherever you are. 

Pros & Cons

Pros:

• 1,000+ games from industry-leading providers.
• Bonuses on slots, sports, and live casino games.
• Fully loaded sportsbook with plenty of betting markets.
• Numerous fast payment options accepted.

Cons:

• More focused on sports betting than casino.

3. Magic Red

This non Gamtop casino promises to astonish with a spellbinding selection of slots and an awesomely authentic live casino. Magic Red Casino is perhaps the most reputable platform around, thanks to oversight from the well-respected Malta Gaming Authority and regular fairness audits from iTechLabs.

Game Selection (4.7/5)

Magic Red Casino is partnered with more top-tier software providers than you can shake a stick (or wand) at. Expect to find slots from NetEnt, Microgaming, Pragmatic Play, Evolution, Play’n GO, & Hacksaw Gaming, just to name a few. There are more than 2,000 slots to be spun on Magic Red, including some of the iGaming industry’s most famous and popular titles: Starburst, Gonzo’s Quest, and Book of Dead. If slots aren’t your thing, then Magic Red’s live casino provides multiple variants of blackjack, roulette, baccarat, and poker. 

Bonus Value (4.6/5)

A wondrous welcome package awaits new players at Magic Red Casino: a 100% matched deposit bonus worth up to £100 and a surprise addition of 100 free spins. Loyal players can also collect daily free spins during Happy Hour and take advantage of weekend cashback on live casino games. Sports bettors are looked after, too, with a £10 bonus bet just for signing up. 

Payment Methods (4.5/5)

Blink, and you miss it: Magic Hat’s deposits and withdrawals are incredibly quick and efficient. Thats because all the best e-wallets are accepted, including PayPal, Neteller, and Payz, meaning no one should have to wait more than a few hours for a payout. Obviously, slower, more standard payment options are also accepted for users so inclined. Prepaid cards like AstroPay and PaySafeCard are compatible too. 

Customer Service (4.3/5)

Our only gripe with Magic Hat is the platform’s lack of 24/7 customer support. Don’t get us wrong, the customer service team at Magic Hat is excellent, responding quickly and professionally to our questions. But limited availability is a hard downside to overlook. Thankfully, Magic Hat’s stellar reputation for fair play and transparency is reassuring. The platform is MGA-regulated and fully audited by iTechLabs to certify fairness.

Mobile Usability (4.4/5)

The site is fully optimised for mobile play, so you can enjoy all the same features and functionality on a smartphone as on a desktop. It runs and feels just like using an app. No complaints here. 

Pros & Cons

Pros:

• Huge library of over 1,000 casino games.
• Excellent live casino with professional dealers.
• All games proven fair by iTech Labs.
• Safe and secure platform thanks to SSL encryption.

Cons:

• Limited customer support availability.

4. Duelz

This extraordinary casino offers something truly unique: Player vs Player battles. Thats right, on Duelz Casino (so named for its gamified PvP platform), players compete to complete missions and earn exclusive casino rewards. Gamblers who seek novelty are going to love this one. But if your tastes are a bit more vanilla, rest assured, Duelz is more than just a clever gimmick.

Game Selection (4.4/5)

At Duelz Casino, you’ll find a superb selection of over 2,000 games, each one provided by highly regarded providers and developers like NetEnt and Evolution Gaming. All tastes and preferences are accounted for on Duelz Casino. Whether you want plain and simple classic slots and table games or new and novel crash games and megaways, it’s all here. 

Bonus Value (4.5/5)

Players joining the fray for the first time are greeted with a 100% deposit match bonus worth up to £100. And to sweeten the pot, there’s 100 free spins on the popular Book of Dead slot, too. Meanwhile, loyal dualists who regularly return to battle can enjoy 10% weekly cashback on their losses and participate in thrilling tournaments with daily, weekly, and monthly prize pools.

Payment Methods (4.3/5)

Money-wise, all is well handled at Duelz Casino. Deposits are straightforward and possible via a number of options, including debit cards, e-wallets, prepaid cards and bank transfers. Withdrawals have been fast and hassle free in our experience, especially when using PayPal and Skrill. 

Customer Service (4.6/5)

Duelz Casino’s customer support team is available 24/7 via live chat, so no matter when you encounter an issue, help is at hand. During our testing, we never encountered any issues with the platform, and when grilling customer service, we couldn’t think of a query that they couldn’t resolve.

Mobile Usability (4.2/5)

Listen closely, and you can Duelz Casino practically crying out for a mobile app. Its absence is sorely felt, even if only because it feels like a missed opportunity. The gamified platform is an excellent idea that we are sure could be further improved by a dedicated app.  That said, the platform does work on mobile. Quite well, in fact, with every feature of the site functioning as intended. 

Pros & Cons

Pros:

• Engage in PvP battles for casino rewards.
• Huge game library with 2,000+ titles.
• Fast and secure payouts.
• 24/7 customer support.

Cons:

• No sportsbook.

5. 888Casino

This award-winning online casino needs no introduction. 888Casino has been entertaining UK gamblers since 2003, and is still going strong today. Grabbing the last spot on our illustrious list of non GamStop casinos thanks to its vast selection of games, generous bonuses, and enduring reputation, 888Casino is a sure bet for a good time,

Game Selection (4.4/5)

With a more than respectable 2,000 game library, 888Casino caters to all types of players. The spin-obsessed can enjoy the full spectrum of slot offerings, from classic fruit machines to video slots, progressive jackpot slots, and megaways. There’s table games too, of course, all the usual suspects present, and a live casino which (among other things) offers a particularly excellent and varied live bingo selection. 

Bonus Value (4.1/5)

When it comes to 888Casino’ bonuses, stingy is too strong of a word, but then, so is generous. New players get a modest 50 free spins to be used exclusively on Big Bass Splash. Meanwhile, Sports bettors can enjoy a 100% profit boost on their first bet, worth up to £100. There are a few ongoing bonuses for returning players up for grabs, too, but nothing to write home about. 

Payment Methods (4.3/5)

Through rigorous testing we were nothing but impressed with 888Casino’ efficient payment processes.  Funds can be deposited and withdrawn by all the most popular means, from Visa and MasterCard to PayPal and Trustly. This flexibility ensures fast and hassle-free transactions for all users. 

Customer Service (4.2/5)

Support at 888Casino is available through various channels: the usual email and live chat, and also telephone! In our experience, waiting for a telephone response does actually take longer than simply using the live chat function. But we understand that plenty of old-school players will immensely appreciate being able to talk through technical issues directly. 888Casino deserves high praise for this extra-mile customer service feature. 

Mobile Usability (4.5/5)

The 888Casino mobile app is compatible with iOS and Android, offering a premium gaming experience on the go. The UI is user-friendly, loads fast, never crashes (in our experience) and offers secure login options, which we really love. 

Pros & Cons

Pros:

• Over 1,300 slots, including 888Casino exclusive titles.
• Generous welcome offer with free spins.
• VIP program for loyal players.
• Fast payouts and reliable customer support.

Cons:

• Not many virtual table games.

Top Casinos Not on GamStop Compared

The following table shows how our recommended non-GamStop casinos in the UK compare in terms of welcome bonuses, the minimum deposit needed to trigger the bonus, and the licensing information.

Casino	Welcome Bonus	Min. Deposit	License
CasiGO	825 free spins split over the first five deposits	£20	UKGC
Betano	Wager £10 to get £40 free bet	£10	MGA
Magic Red	100% deposit match up to £100 & 100 free spins	£10	MGA
Duelz Casino	100% deposit match up to £100 & 100 free spins	£20	MGA
888Casino	50 free spins on selected slots	£10	UKGC
Ladbrokes	£30 bonus funds upon sign-up	£10	GLA
10Bet	50% matched deposit up to £250	£20	UKGC
Rizk Casino	Daily “Wheel of Rizk” randomised bonuses	£0	MGA
Coral Casino	£30 bonus funds upon sign-up	£10	GLA
SpinYoo	100% deposit match up to £100 & 100 free spins	£10	MGA

How We Rank Non-GamStop Casinos

Before we recommend non-GamStop casinos in the UK, we must review and rate them based on strict criteria. Our ranking criteria involve checking the following important casino aspects:

• Licensing and regulations – For an online casino not on GamStop to appear on our list, it must be licensed and regulated by reputable authorities. We check if the casinos are licensed by renowned authorities such as the Malta Gaming Authority and the Government of Curacao.
•  Game selection – We also check if the casinos have a vast range of non-GamStop casino games. In particular, we check if Aussies can play pokies, jackpot games, video poker games, crash games, table games, Bingo, and live games.
•  Bonuses and promotions – Casino bonuses are a great way for Aussies to play casino games without spending more of their money. To this end, we only recommend non-GamStop casinos with incentives such as match bonuses, no deposit bonuses, free spins, and cashback bonuses.
• Payment methods – Casino payment methods are an important casino aspect as they allow you to deposit and withdraw funds. During our ranking process, we check if the UK citizens can make safe and secure payments using credit/debit cards, e-wallets, and bank transfers.
• Customer support – We only recommend non-GamStop casinos that offer excellent customer support service. We check if players can contact support agents 24/7 via live chat, email, phone and contact form.

What is Non-GamStop?

GamStop is a self-exclusion programme that was founded in April 2018 by the UK Gambling Commission. The programme was created with one primary goal – to help gamblers with online gambling problems. Besides that, it is a free and voluntary service, meaning you join when you want and without paying anything. 

When registering with the GamStop programme, you are required to submit personal details such as email address, full name, phone number, address and postal code. GamStop also requires you to specify how long you want to restrict yourself from gambling. The self-exclusion period can be 6 months, 1 year, or 5 years.

Once you submit the required details, they are entered into the GamStop database. The database is then connected to the UKGC-licensed casinos. This means you won’t be able to register with any online casino licensed by the UK Gambling Commission until the self-exclusion period elapses. 

Non-GamStop casinos, on the other hand, are gambling sites not affiliated with GamStop or the UK Gambling Commission. The casinos don’t use the GamStop database, meaning you can sign-up for an account and play without restrictions.

Licensing of Casinos Not on GamStop

The UK online casinos that we recommend are offshore sites. This means the sites operate in the UK with offshore licenses, making them 100% legal and legit. Some of the licenses they operate with are as follows:

• Curacao – The Government of Curacao is by far one of the most popular licensing bodies in the gambling industry. The authority offers master and sub-licenses, which cover all types of games. However, the holder of the master license has the right to issue licenses to others.
• Malta Gaming Authority (MGA) – The Malta Gaming Authority is a Malta-based gaming control board responsible for regulating all forms of gambling, including online and land-based gambling services. In addition to that, the authority issues two types of licenses – Business 2 Consumer (B2C) and Business 2 Business (B2B).
• The Gibraltar Betting and Gaming Association (GBGA) – The small Mediterranean island of Gibraltar is home to another respected regulator of non GamStop casinos. Using the UK Gambling Commission’s player-first approach as a template, the GBGA enforces stern consumer protection measures. Non GamStop casinos licensed in Gibralter tend to have the most robust responsible gambling tools and resources. 

Are Non-GamStop Sites Safe?

We have vetted our non-GamStop casinos in the UK for safety, security, and trustworthiness and can assure you that they are the best. The sites hold legit licenses, which means you can sign up and play knowing you are in safe hands. In you have a complaint, you can always seek help from the licensing authority. The casinos also utilize SSL technology, allowing you to deposit and withdraw funds safely and securely.

Keep This in Mind When Playing at Non-GamStop Casinos

As we mentioned earlier, non-GamStop casinos in the UK allow you to play for real money without restrictions. While this may sound great, it could lead to problem gambling among gamblers. This means you need to control the way you gamble so that you don’t suffer from gambling problems. 

One way you can control your gambling behaviour is by utilising the responsible gambling tools offered by non-GamStop casinos.

For example, most casinos allow you to set different types of limits, including deposit limits, wager limits, loss limits, and time limits. 

Some casinos also have a self-exclusion program that allows you to take a break from gambling. Depending on the casino, you can exclude yourself from gambling for 1 month, 6 months, 1 year, or 5 years.

Popular Casino Games for Real Money

Our recommended non-GamStop casinos in the UK are unrivalled when it comes to game selection. Be ready to explore thousands of real money pokies, hundreds of table games and live games, and dozens of video poker and specialty games.

Pokies

Since the launch of the first online casino around the 1990s, online pokies have evolved to become the most popular casino games among punters. As of now, there are thousands of pokie machines you can play online, including classic pokies, video pokies, jackpot pokies, 3D pokies, and Megaways. All the best pokies in terms of RTP, paylines, bonus features, and themes are available at our featured casinos. 

Roulette

Roulette is a pure guessing game that has been entertaining gamers since the 18th century. The game has simple gameplay, as you only need to bet where you think the white ball will land on the roulette wheel. For example, you can bet on single numbers, red/black, and odd/even. Our best casinos not on GamStop offer you roulette variants like Golden Chip Roulette, American Roulette, Roulette Royale, Casino Roulette, and European Roulette. 

Blackjack

Blackjack is a popular card game played with a deck of 52 cards. The goal of the game is to reach a score close or equal to 21 without busting. Moreover, your hand must be higher than that of the dealer in order to win. Once you join our recommended non-GamStop casinos in the UK, you will enjoy playing blackjack games such as European Blackjack, 21 Blackjack, Classic Blackjack, Back Blackjack, and American Blackjack.

Baccarat

Baccarat is another game of chance played with a deck of 52 cards. The goal of baccarat is to predict which hand between banker and player is closest to 9. This means you will bet on the player’s side or the banker’s side. There is an option to bet on the tie. Among the most popular baccarat variants you can play include Punto Banco, Baccarat No Commission, Big Win Baccarat, and Mini Baccarat.

Video Poker

Video poker is a card game played with a standard 52-card deck. The goal of the game is to form the best 5-card hand possible from 5 or 7 cards you are dealt. Our casinos have variants such as Joker Poker, Magic Poker, Jacks or Better, Aces & Eights, Bonus Poker, and All Aces.

Live Games

Live games also dominate our best non-GamStop casinos in the UK. These are table games hosted by human dealers, and you can play them without leaving the comfort of your home. All you need to have is an internet connection and a desktop computer or mobile device. The best live games you can play include Live Poker, Live Roulette, Live Blackjack, Live Baccarat, and Live Game Shows.

Software Developers at the UK Casinos

Most online casinos don’t develop their own games. Instead, they source games from third-party providers while they focus on handling payments. Fortunately, our top non-GamStop casinos in the UK have partnered with world-class game providers, including the following:

• NetEnt – Established in 1996, NetEnt is one of the oldest software developers with over 200 casino games. The games from this provider range from classic pokies, video pokies, progressive jackpot pokies, table games, and live games.
•  Microgaming – Microgaming hit the market in 1994 and has since created more than 500 online games. Video pokies, progressive jackpot pokies, table games and video poker are some of the best games from the developer.
• Playtech – Playtech is another high-end software developer that has been creating entertaining and rewarding casino games since 1999. As of now, the company has created over 600 games, including pokies, table games, and live games.
• Play N’ Go – Founded in 2005, Play N’ Go is one the leading software providers in the industry with over 200 titles under its belt. The provider is known for creating pokies, with Book of Dead, Legacy of Dead, and Secret of Dead being the most popular ones.
• Evolution Gaming – Evolution Gaming is the leading live casino software provider that has been on the market since 2006. The company has over 200 live games under its belt, including Live Roulette, Live Poker, Live Game Shows, Live Baccarat, and Live Blackjack.
• Pragmatic Play – one decade since its launch, Pragmatic Play has become a powerhouse provider of live games and slots. Non GamStop casinos often play host to Pragmatic Play’s signature ‘Drops & Wins’ promotions, which payout huge sums to lucky winners. 

Can I Claim Bonuses at These Types of Casinos?

Offering generous bonuses and promotions is a top priority for non-GamStop casinos in the UK. From sign-up bonuses to regular promos and VIP rewards, the casinos have plenty of incentives for every player. 

Below is a list of casino bonuses you can take advantage of:

• Match deposit bonuses – Match deposit and welcome bonuses are the incentives you get when you make a deposit. When you transfer funds to your account, the amount is matched by a percentage, like 100%. While this bonus is usually offered to newcomers, there are some non-GamStop casinos that offer it to regular players.
• Free spins – Free spins speak for themselves. They are the free chances you receive at online casinos that offer pokies. Also known as bonus spins or extra spins, free spins allow you to play pokies for free.
•  No deposit bonuses – A no deposit bonus is by far the best incentive you will ever get at an online casino not on GamStop. The bonus doesn’t require you to make any qualifying deposits. By registering an account or completing simple tasks, you will become eligible for the bonus.
•  Cashback – the online casinos not registered with GamStop also return part of your losses in the form of cashback bonuses. Some casinos on our list, for example, have weekly cashback bonuses and live casino games cashback bonuses.
• Prize Wheels – Sometimes, the thrill of a reward is its randomness. Online gamblers, in particular, are naturally inclined to love a mystery prize. Knowing their audience, many non GamStop casinos offer players the chance to spin a wheel of prizes. Smaller prizes are, of course, more frequent, but walking away empty-handed is rarely a possibility. 

Payment Methods for the UK Players

Most non-GamStop casinos in the UK accept different payment methods, allowing you to make safe, secure, fast, and anonymous transactions. The casinos also support credit/debit cards, e-wallets, and bank transfers.

• E-wallets – Electronic wallets are also safe and secure as you don’t need to submit any financial information to the casino. Among the best e-wallets you can use include MuchBetter, Skrill, Neteller, eZeeWallet, AstroPay, and Sticpay.
• Credit/debit cards – If you prefer traditional payment methods, casino non-GamStop sites have got you covered. The casinos support cards issued by Visa, Mastercard, Amex, and Discover.
• Bank Transfer – Some non-GamStop sites also allow you to transfer funds directly from your casino account to your bank account.

Pros & Cons of Playing on Non-GamStop Platforms

It is clear now that non-GamStop casinos in the UK offer plenty of benefits to players. 

However, there are a few disadvantages that you need to keep in mind.

Pros:

• No ID verification – Once you join casinos without GamStop, you will not need to verify your ID in order to start playing.
•  Bigger bonuses – Non-GamStop casinos don’t pay hefty taxes, which means they have a lot to offer to players in the form of incentives.
• Faster withdrawals – E-wallets supported by non-GamStop casinos allow you to withdraw instantly.
•  Numerous payment methods – Unlike GamStop casinos, non-GamStop sites have a vast range of payment methods, including e-wallets.

Cons:

• May lead to problem gambling – Playing without restrictions could lead to problem gambling among players.
• Lack of mobile apps – Unlike GamStop casinos, most Slot Sites Not on Gamstop don’t have downloadable mobile apps.

Below is a table showing how GamStop and non-GamStop casinos compare:

GamStop Casinos	Non-GamStop Casinos
Licensed by the UK Gambling Commission	Licensed by the Government of Curacao, MGA
Small bonus offers	Bigger casino bonuses
A few payment options	Plenty of payment methods
Most of the sites have mobile apps	Most of the sites don’t have mobile apps
ID verification is a must	Players don’t need to verify their ID

The Best Non-GamStop Casino in the UK

Slot Sites Not on Gamstop in the UK are the best alternative for Aussies who want to play for real money without any restrictions. The sites are offshore casinos, meaning you can sign up and play without breaking any law. 

After comparing dozens of non-GamStop casinos, we can happily say that CasiGO is the best online casino overall. The site has a legit Curacao license, a wide range of casino games, generous casino bonuses, safe payment methods, and great customer support. We have also vetted the casino for safety and trustworthiness, meaning you can sign up and enjoy unrivalled gameplay in a secure gaming atmosphere.

FAQs

Are Slot Sites Not on Gamstop in the UK legal and legit?

Yes, the UK casinos not registered with GamStop are licensed and regulated by respected licensing bodies such as the Government of Curacao and MGA.

What games can I play at non-GamStop casinos?

Non-GamStop casinos offer thousands of games in different categories, such as pokies, table games, video poker, specialty games, and live games.

Are there responsible gambling tools at Slot Sites Not on Gamstop?

Non-GamStop casinos may not follow the same responsible gambling practices as UKGC-licensed casinos. They might lack self-exclusion tools, deposit limits, or support for problem gambling. Players should be cautious and consider their personal gambling habits before engaging.

Are Non-GamStop Casinos Legal in the UK?

Non-GamStop casinos are not illegal, but they are not licensed or regulated by the UK Gambling Commission (UKGC). While it is legal for UK residents to play at these casinos, they do so at their own risk, as these platforms do not offer the same level of consumer protection as UKGC-licensed casinos.