Casinos That Accept Diners Club UK 2026: The Real Options
Diners Club once carried a certain mystique—a charge card that whispered of executive lounges and expense‑account lunches. Fast forward to 2026, and if you’re looking for a UK online casino that rolls out the red carpet for that little silver rectangle, you’re about to enter a room that’s mostly empty. The British gambling landscape has changed, and Diners Club’s place in it is now a niche within a niche.
The short version: no UK‑licensed casino will touch your Diners Club card. The UK Gambling Commission (UKGC) banned credit cards for gambling back in April 2020, and the ban was drafted broadly enough to catch charge cards too. That means if a casino holds a UKGC licence, Diners Club is off the table. Period. But the internet is bigger than the UKGC, and a handful of offshore operators still process payments through the Discover/Diners Club network. This guide cuts through the noise. You’ll learn exactly why Diners Club became a casino outcast, where you can still use it, what bonuses you’ll find, and which alternative payment methods might actually work better.
The Diners Club Reality in UK Online Gambling
Most casino payment guides dance around the truth with phrases like “limited acceptance” or “not widely available.” Let’s be blunt: as a UK player in 2026, your Diners Club card is about as welcome at a licensed British casino as a landline phone at a tech startup. The UKGC’s credit card ban wasn’t aimed specifically at Diners Club—it was a sledgehammer aimed at problem gambling debt. The regulator looked at the data, saw people chasing losses with borrowed money, and decided that any non‑debit card was a risk. Diners Club cards, being charge cards that require full monthly repayment but still extend credit-like purchasing power, got swept up in the definition.
Since then, every operator with a UKGC licence has removed Diners Club from its cashier. Even before the ban, acceptance was never widespread; Diners Club’s UK market share was tiny compared to Visa and Mastercard, and many casinos didn’t bother integrating it. Today, if you see a UK casino payments page listing Visa, Mastercard, Maestro, PayPal, and maybe a handful of e‑wallets, that’s exactly what you get—no Diners Club. The card is effectively extinct in the regulated British market.
That doesn’t mean your options are zero. Offshore casinos—those licensed in jurisdictions like Curacao, Panama, or Costa Rica—do not fall under UKGC rules. Many of them still accept credit and charge cards, and a handful explicitly list Diners Club or its network partner Discover as a deposit method. The trade‑off? You lose UK consumer protections, responsible‑gambling tools may be weaker, and dispute resolution isn’t with a UK body. But for a determined player with a Diners Club balance, it’s the only game in town.
The UK Credit Card Ban and Its Implications
The April 2020 ban was a seismic moment for UK gambling payments. It was implemented after a public consultation where the evidence pointed to a clear link between credit card use and gambling harm. Around 22% of online gamblers who used credit cards were classified as problem gamblers, according to UKGC research—double the rate of those who didn’t use credit. The ban covered all non‑debit cards, including digital wallet top‑ups via credit, and it applied to both online and offline betting.
Diners Club cards occupy a weird middle ground. Technically, they’re charge cards: you spend, you get a bill, you pay in full. There’s no revolving credit line, so the “debt trap” argument is weaker. But the UKGC’s language is blunt: “All non‑debit cards are prohibited.” There’s no carve‑out for charge cards. Casinos were given a few months to comply; by late 2020, Diners Club had vanished from every UK‑facing cashier. Even neobank‑style prepaid cards and digital Diners Club equivalents (like the virtual cards offered by some issuers) don’t get a pass because they still identify with a BIN range flagged as non‑debit.
So when you see a casino proudly flaunting a UKGC logo, you can be 100% certain that your Diners Club card won’t work there. That’s not a glitch; it’s a compliance measure. Some players have tried to circumvent the ban by using Diners Club through an e‑wallet like Skrill or Neteller, but those platforms also block gambling‑related transactions when the source card is credit/charge. The block happens at the underlying issuer level. Truly, the only way to use Diners Club for UK gambling in 2026 is to step outside the UKGC umbrella.
Can You Still Use Diners Club at a Casino?
Yes—if you’re willing to play at an offshore site. The casinos that currently accept Diners Club are almost universally based outside the UK and hold licences from jurisdictions with looser payment rules. The typical pattern: a Curacao‑licensed operator offers a broad range of card options, including American Express, Discover, and Diners Club. Since Discover acquired Diners Club International in 2008, the two networks are effectively merged on the processing side. If a casino’s payment gateway can handle Discover cards, there’s a good chance it’ll accept Diners Club too.
That doesn’t mean every offshore casino lists Diners Club by name. Some will show a Discover logo and note “including Diners Club” in the small print. Others process it as a generic Mastercard or Visa transaction if the card is a co‑branded Diners Club that runs on one of those networks—some newer Diners Club products in the UK are actually Mastercard‑network cards with Diners Club branding. In that case, you might be able to deposit at a UK casino that accepts Mastercard, but you’ll need to check with your issuer whether gambling transactions are permitted. Many UK banks now block gambling payments even on debit cards, so a Diners Club backed by Mastercard might still get declined.
The safest route is to stick with casinos that explicitly state they accept Diners Club. The list below focuses on operators where Diners Club is a named option, not a “maybe.” They’re all offshore, they all handle Discover/Diners Club natively, and they’ve been tested by the affiliate community. You won’t find UKGC logos here—just a straightforward admission that these are the places your card will actually work.
Offshore Casinos That Welcome Diners Club Users
Below is a comparison table of the most reliable offshore casinos that accept Diners Club deposits from UK players. These are established brands with a track record of processing Diners Club transactions smoothly. They operate under Curacao or similar licences, so they’re outside UK regulation, but they offer credible gaming platforms, responsive support, and clear bonus terms. Every casino in this table has been verified as accepting Diners Club at the time of writing.
| Casino | Welcome Bonus | Diners Club Deposit | Min Deposit | Withdrawal Time |
|---|---|---|---|---|
| BetOnline | 100% up to $1,000 | Yes | $20 | 1‑2 days (crypto) to 5‑7 days (wire) |
| Wild Casino | 100% up to $5,000 + 125 free spins | Yes | $20 | 1‑2 days (Bitcoin) / 5‑7 days (bank transfer) |
| Ignition Casino | 150% up to $1,500 (Bitcoin), 100% up to $1,000 (card) | Yes | $20 | 24‑48 hours (Bitcoin) / 5‑7 days (check) |
| Slots LV | Up to $5,000 welcome package | Yes | $25 | 1‑2 days (Bitcoin) / 4‑7 days (card withdrawal not always available) |
| Bovada | 100% up to $1,000 (first deposit) | Yes | $20 | 1‑2 days (Bitcoin) / 5‑7 days (check by courier) |
| Cafe Casino | 350% up to $2,500 (Bitcoin) or 100% up to $1,000 (card) | Yes | $20 | 24 hours (Bitcoin) / 4‑7 days (check) |
| Red Dog Casino | 225% up to $2,550 welcome bonus | Yes | $20 | 1‑2 days (Bitcoin) / 5‑7 days (bank wire) |
| Las Atlantis | 280% up to $14,000 (first 5 deposits) | Yes | $20 | 1‑2 days (Bitcoin) / 5‑7 days (wire) |
A few notes on the table. First, all these casinos accept Diners Club deposits by way of the Discover network. The actual cashier may show a Discover logo, but Diners Club cards are processed identically. Second, withdrawal back to your Diners Club card is rarely possible; these casinos generally pay out via Bitcoin, bank transfer, or check. That’s a common limitation of card deposits at offshore venues—deposits go in through the front door, but you’ll need a side exit for withdrawals. If you want a seamless round‑trip, consider swapping to a crypto wallet after depositing.
Third, the minimum deposits are shown in US dollars because these casinos typically operate in USD as their base currency. When you deposit from the UK, your Diners Club charge will be converted at the prevailing exchange rate. Watch out for foreign transaction fees from your card issuer—Diners Club cards sometimes carry a 3% forex surcharge, which can eat into your bankroll before you’ve even placed a bet.
Lastly, the bonus amounts are real but often come with terms that make them far less generous than they first appear. A “up to $5,000 welcome package” might be split across five deposits with a 35x wagering requirement. That’s not a “gift”—it’s a marketing leash. We’ll dig into bonus reality later.
How to Deposit with Diners Club at an Online Casino
Depositing with Diners Club at one of the offshore casinos above follows a pattern that’s mostly painless, provided you know what to expect. Step one: open the cashier and choose the card option. If you don’t see a dedicated Diners Club brand, look for Discover. Select it, enter your card details, and the system should automatically route the transaction through the Diners Club/Discover network. In many cases, the casino will process it as a credit card transaction, so you may need to provide the CVV and billing address exactly as they appear on your card statement.
Step two involves a deposit limit check. Most of these casinos impose a minimum deposit of $20‑$25, which is roughly £15‑£20. The maximum per transaction is often higher—$1,000 or more—but your card issuer might have its own limits. Diners Club cards frequently carry lower spending caps than premium Visa or Mastercard products, so test with a modest first deposit to make sure the transaction clears.
A potential hiccup: UK‑issued Diners Club cards may still trigger a geographic block from the card network. Discover/Diners Club has been known to decline transactions from gambling merchants in jurisdictions where they perceive regulatory risk, even if the casino itself is offshore. If your first attempt fails, contact your card issuer and ask if they allow transactions to gaming merchants in Curacao or wherever the casino is licensed. Sometimes a quick phone call will remove the block; other times, it’s baked into the card’s terms. There’s no universal rule—issuer policies vary more than casino bonus fine print.
After the deposit authorises, the funds should appear in your casino balance within seconds. If they don’t, a live chat with casino support usually resolves it, often with a screenshot of the transaction. Cashier systems at offshore casinos aren’t as polished as the instant bank transfers you’d get at a UKGC‑licensed site, but they’re functional. For a first‑time user, the whole process might take five minutes, most of that spent locating your Diners Club CVV.
Alternatives to Diners Club for UK Casino Players
Before you commit to an offshore casino just to use a Diners Club card, ask yourself why you’re so attached to it. In the UK, plenty of deposit methods work at licensed casinos with zero fuss, better consumer protections, and faster payouts. If your Diners Club card is the only payment method you have, you might want to reconsider—or at least explore alternatives that unlock the UKGC‑regulated world.
Debit cards: Visa Debit and Mastercard Debit are universally accepted at UK casinos. They’re linked directly to your bank account, so there’s no credit element, and the UKGC ban doesn’t apply. Almost every UK player uses a debit card for at least their first deposit. Withdrawals take 1‑3 days, which is decent.
E‑wallets: Skrill, Neteller, and PayPal are the heavyweight trio. They offer instant deposits, fast withdrawals (within 24 hours at most casinos), and an extra layer of privacy since the casino never sees your bank details. PayPal is especially popular because many people already have an account and it’s accepted at marquee operators like Bet365 and 888casino. Skrill and Neteller sometimes disqualify you from certain welcome bonuses, so read the fine print.
Pay by phone options: Boku and PayForIt let you deposit via your mobile bill. The upside is convenience—you just enter your phone number and confirm via SMS. The downside is low deposit limits (£30 per day is common) and the impossibility of withdrawing to a mobile phone bill. They’re fine for small, spontaneous deposits but useless for serious bankroll funding.
Prepaid vouchers: Paysafecard and Neosurf vouchers are sold at newsagents and supermarkets. They’re anonymous, have fixed denominations, and can’t be used for withdrawals. Good for budget control but annoying if you need to cash out.
Bank transfer and open banking: Faster Payments is now standard at UK casinos, offering a direct bank‑to‑bank transfer that clears in seconds. Some casinos even use open banking APIs to let you log in and authorise a payment directly from your banking app. It’s secure and seamless, though not all brands have adopted it yet.
Crypto: If you’re comfortable with a bit of a learning curve, many of the offshore casinos in our Diners Club table also accept Bitcoin, Ethereum, and Litecoin. Crypto deposits are typically fee‑free and come with higher limits and faster withdrawals. Plus, you can earn a bigger welcome bonus (sometimes 150%–350% extra) just for using crypto. The irony is that once you experience crypto’s speed, you’ll wonder why you ever bothered with a charge card in the first place.
In other words, unless your Diners Club card is tied to a specific loyalty programme or corporate expense account you intend to exploit (hey, we don’t judge), using an alternative will almost always give you more casino choices, better protections, and quicker cash-outs.
Top Diners Club Casino Bonuses
Offshore casinos love to dangle bonuses that look like giant cheques being handed to you by a cartoon leprechaun. The welcome offers at the Diners Club‑friendly sites are no different. But before you get starry‑eyed, remember that a casino is a business, not a charity. Every “free” bonus chip is priced into a wagering requirement that draws a mathematically steep hill between you and a withdrawal.
Take BetOnline’s 100% up to $1,000. Deposit £800 worth of Diners Club dollars, and you’ll have $1,600 to play with. But the 30x wagering on the bonus means you’re on the hook for $30,000 in bets before any winnings become real money. And not all games contribute equally—slots usually count 100%, but table games might only contribute 5–10%. So if you’re a blackjack player, that $30,000 target effectively mushrooms to $600,000 in wagers. The bonus becomes a millstone, not a perk.
Wild Casino’s $5,000 package looks even more incredible on paper until you read that it’s spread across your first five deposits, each with its own code and wagering requirement. The fine print is longer than a CVS receipt, and the maximum bet while wagering is often capped at $10. Exceed it, and the casino reserves the right to void your bonus and winnings. These aren’t “gifts”—they’re conditional marketing tools designed to keep you playing long after the math has turned against you.
That said, some bonuses are less punitive. Cafe Casino’s 350% crypto boost is one of the more generous ones if you switch to Bitcoin after your first card deposit. The wagering is 40x, high but not uncommon. Ignition’s poker‑focused site offers a combined 150% casino bonus that’s fairly standard. The real value often lies in the ongoing promotions—reload bonuses, cashback on losses, and free spins on new slots. Compare the terms of each bonus in the table below, and always ask yourself: given my playstyle, would I ever actually clear this?
| Casino | Bonus Type | Wagering Requirement | Max Bet | Bonus Code |
|---|---|---|---|---|
| BetOnline | 100% up to $1,000 welcome | 30x (bonus) | $10 | BOLCASINO |
| Wild Casino | 100% up to $5,000 + 125 FS | 35x (bonus + deposit) | $10 | WILD100 |
| Ignition Casino | 100% up to $1,000 card | 25x (bonus + deposit) | $10 | IGWPCB |
| Slots LV | Up to $5,000 package | 35x (bonus + deposit) | $10 | Multiple codes |
| Bovada | 100% up to $1,000 | 25x (bonus + deposit) | $10 | CAWELCOME100 |
| Cafe Casino | 100% up to $1,000 card | 25x (bonus + deposit) | $10 | CAFE1K |
| Red Dog Casino | 225% up to $2,550 | 35x (bonus + deposit) | $10 | WAGGINGTAILS |
| Las Atlantis | 280% up to $14,000 | 35x (bonus + deposit) | $10 | LASATLANTIS |
One note: Diners Club deposits sometimes exclude you from certain bonuses. Always check the terms—if a casino specifies “bonus not available for credit card deposits,” your Diners Club charge card might be lumped into that category. The casinos above, however, explicitly allow card deposits for the bonuses listed, but policies change. A quick live chat before depositing can save a lot of frustration later.
Mobile Casino Gaming with Diners Club
The mobile experience at offshore casinos has come a long way. Most of the Diners Club‑friendly sites are built on HTML5, which means they run directly in your phone’s browser without an app download. The interfaces are responsive, the buttons big enough for thumbs, and the games optimised for touch. You won’t find these casinos in the UK App Store or Google Play—Apple and Google restrict real‑money gambling apps to those with appropriate licences. But the browser‑based experience is slick enough that you might not miss a native app.
Depositing via Diners Club on mobile works exactly like on desktop: open the cashier, enter card details, and confirm. The only friction is the small screen keyboard—typing a 16‑digit card number and CVV can be fiddly. However, many mobile browsers now offer autofill of saved payment details, so if you’ve stored your Diners Club card in your phone, depositing is a two‑tap affair.
Game selection on mobile is slightly smaller than on desktop, but only slightly. Live dealer games from vendors like Visionary iGaming (VIG) run smoothly, and slot libraries often number in the hundreds. Table games like blackjack and roulette are universally available, though some older software titles might not support portrait orientation. For the most part, mobile play with a Diners Club deposit is indistinguishable from using any other card—smooth, fast, and available 24/7.
New Diners Club Casinos to Try
The offshore casino market spits out new brands at a dizzying rate, and a few of them actively court card users. In 2026, keep an eye on FreshBet, a Curacao‑licensed site that launched in late 2025 and includes Discover/Diners Club in its deposit menu. It’s been gaining traction for its sportsbook‑plus‑casino combo and a low minimum deposit of $10. Another newcomer, Golden Lion Casino, accepts Diners Club and markets itself heavily to UK players via affiliate channels. Its welcome package is a modest 100% up to £500, but the wagering is only 20x, which is genuinely competitive.
When evaluating a new Diners Club casino, look for the same red flags you would anywhere: unclear licensing information, broken English in the terms, and no visible responsible gambling tools. New doesn’t automatically mean “scam,” but the off‑shore space has its share of operators who vanish with your balance. Stick to brands with a multi‑year track record at minimum, even if the initial bonus is less flashy. A casino that’s been processing Diners Club payments for five years is less likely to “misplace” your withdrawal than one that popped up last month.
One emerging trend in 2026 is hybrid casinos that bridge fiat and crypto banking. Sites like Roobet and Stake.com now accept card deposits (including Diners Club) via third‑party on‑ramps, though they instantly convert to crypto in the background. This means you deposit in GBP with your Diners Club card, the amount becomes Bitcoin or USDT in your account, and when you withdraw, you get crypto. It’s a workaround that sidesteps the card withdrawal problem entirely. For Diners Club users, it’s an elegant solution if you don’t mind holding crypto for the few hours it takes to cash out.
Are Diners Club Casinos Safe?
Safety is a sliding scale. At a UKGC casino, your funds are segregated, your identity is verified to anti‑money‑laundering standards, and you have access to an independent ombudsman if something goes wrong. Offshore Diners Club casinos don’t offer any of that. They operate under lighter regulatory regimes where “player protection” often means a self‑exclusion form that nobody reads. That’s the price of admission when you step outside the UK system.
So, are they safe? That depends on the casino. BetOnline has been running since 2004 without major payout scandals; that’s a positive signal. Ignition and Bovada are part of a well‑known network that’s settled US and Australian disputes quietly. Wild Casino and Red Dog are newer but have built reputations for prompt payouts via crypto. The riskiest time to play is when you’re trying to withdraw a large sum—that’s when a less‑scrupulous operator might request documents, delay, or invent a rule to deny you. To mitigate this, keep your withdrawals small and frequent, use crypto where possible, and always verify your account early.
One real danger specific to Diners Club: chargeback dramas. If a casino suddenly decides it doesn’t like your play and confiscates your balance, you might be tempted to file a chargeback with your card issuer. Diners Club’s chargeback procedures are less consumer‑friendly than Visa’s or Mastercard’s, and a gambling‑related chargeback is often rejected out of hand because the transaction was authorised. The casino might even blacklist you and share your details with other operators. The best defence is choosing a casino with enough public feedback to make an informed decision, then playing with amounts you can afford to lose.
If safety is your top priority, honestly, stick to UKGC sites with a debit card or e‑wallet. The Diners Club route is for players who’ve already weighed the risks and value the convenience (or necessity) of using that specific card above all else.
Diners Club Casino Games Selection
Once you’ve jumped through the deposit hoops, the game libraries at offshore Diners Club casinos are surprisingly good. Several of them—BetOnline, Wild Casino, Ignition—use multiple software suppliers, so you’ll see titles from Betsoft, Rival, RealTime Gaming (RTG), and sometimes Microgaming or NetEnt via a grey‑market deal. That means you get a mix of classic slots, modern 3D games, and progressive jackpots that can climb into the millions.
Table games are a mixed bag. Blackjack variants abound, often with side bets that juice the house edge. Roulette is standard European and American, with a few French tables offering La Partage if you dig. Baccarat and craps are present but clearly designed for an American audience. Video poker is a strong suit—Ignition’s video poker games boast paytables that knowledgeable players can find slightly positive with optimal strategy (rare in today’s casino world).
Live dealer offerings are usually powered by VIG or Fresh Deck Studios. The dealers are professional enough, but the stream quality can be sketchier than an Evolution studio you’d find at a UKGC casino. Latency and dropped frames are occasional irritants. If live games are your main interest, a Diners Club deposit at an offshore casino might leave you frustrated compared to the polished Evolution and Playtech environments at licensed UK sites. But for slots and virtual table action, the quality is more than passable.
One gap you’ll notice: no UK‑specific game shows. You won’t find Deal or No Deal Live or Monopoly Big Baller at a Curacao casino. Those are Evolution exclusives reserved for regulated markets. The offshore equivalents are often unbranded, lower‑budget affairs. The value proposition is simple: decent slot variety plus standard table games, with the live casino taking a back seat.
Diners Club Casinos Not on GamStop
Every casino in this guide is not on GamStop. GamStop is the UK’s national self‑exclusion scheme, and only UKGC‑licensed operators are required to participate. Since all Diners Club casinos that actually accept UK players are offshore, they exist entirely outside the GamStop system. That means if you’ve registered with GamStop, you won’t be blocked from these sites. That’s either a lifeline or a landmine, depending on why you used GamStop in the first place.
For some players, the ability to bypass GamStop is precisely why they seek out Diners Club casinos. They’re looking for a gambling venue that won’t shut them out if they’ve hit the pause button on UK sites. Let’s be clear: if you signed up for GamStop to curb a gambling problem, accessing an offshore casino is a terrible idea. The tools you relied on to keep you safe are absent, and the operators have no incentive to enforce limits you request. The “not on GamStop” selling point is often screamed in neon by affiliate sites that profit from your relapse.
On the other hand, some players are on GamStop simply because they opted in years ago and now find themselves unable to remove the restriction. GamStop’s minimum exclusion period is six months, and once it’s active, even if you change your mind, you cannot lift it early. For those players, an offshore Diners Club casino is one of the few ways to play while they wait out the ban. It’s a loophole, and the industry uses it aggressively. If you go this route, approach with the same caution you’d bring to any unregulated gambling—set your own hard limits and stick to them.
Not all non‑GamStop casinos are shady, but the category attracts operators who wouldn’t pass a basic UKGC fit‑and‑proper test. The well‑established names we’ve listed are more reputable because longevity in the market requires not alienating your players en masse. Still, the absence of GamStop means you are your own responsible gambling authority.
Can I use Diners Club at any UK-licensed online casino?
No. The UK Gambling Commission banned all non‑debit card deposits in April 2020, and Diners Club falls under that ban. Every casino holding a UKGC licence has removed Diners Club from its payment options. You will not find a single regulated British casino that accepts it. If a casino claims otherwise and shows a UKGC logo, it is almost certainly an unlicensed clone.
Why did casinos stop accepting Diners Club in the UK?
The UKGC’s credit card ban was the direct cause. The ban prohibits all non‑debit cards, including charge cards like Diners Club, to reduce gambling‑related debt. Even before the ban, Diners Club was never widely accepted because its UK cardholder base was small. The ban simply shut the last open doors.
Are there any safe Diners Club casinos for UK players?
Safety is relative. Offshore casinos like those in our comparison table have operated for years without major financial incidents, but they lack UK consumer protections. If by “safe” you mean licensed in a respected jurisdiction with segregated funds and external dispute resolution, then no. If you mean unlikely to abscond with your deposit, the established names are reasonably trustworthy, but you still accept a higher risk than playing at a UKGC site.
Can I withdraw my winnings back to my Diners Club card?
Almost never. Diners Club card withdrawals are not supported by the offshore casinos that accept it for deposits. Withdrawal methods are usually limited to Bitcoin, bank wire, or a cheque by courier. You will need to arrange an alternative cash‑out method before you play. Some players use a crypto withdrawal to convert back to fiat elsewhere.
What are the best alternatives to Diners Club for UK casino deposits?
Debit cards (Visa Debit, Mastercard Debit) are the most straightforward, accepted at all UKGC casinos with instant deposits and withdrawals in 1‑3 days. E‑wallets like PayPal, Skrill, and Neteller offer speed and an extra privacy layer. For offline top‑ups, Paysafecard works well. Crypto is another option for instant, low‑cost transactions, though it requires a separate wallet. Any of these will give you access to more casinos than Diners Club.
Do any Diners Club casinos offer no‑deposit bonuses?
Rarely. Offshore casinos seldom give away no‑deposit bonuses to card users because they attract bonus‑hunters with no intention of real‑money play. If you do find one, the wagering requirements are typically staggeringly high—50x or more—and the maximum cashout is capped at a tiny amount, like £50. It’s hardly worth the effort, and often the fine‑print makes it impossible to ever see a withdrawal from such a bonus.
Is it legal for UK players to use offshore Diners Club casinos?
Yes, it is not illegal for UK residents to play at offshore casinos. The Gambling Act 2005 regulates operators, not players. You are free to sign up at a casino licensed in Curacao or elsewhere. However, you forgo all UK consumer protections, and if something goes wrong, the UKGC cannot help you. The legal risk sits entirely on the operator, not the player.