Casino Sister Sites: Who Actually Owns Your UK Casino

Two casinos can look like siblings for three completely different reasons, and the difference decides whether you can claim both welcome offers, whether one account closure takes out the other, and who you complain to when something goes wrong.

The Gambling Commission publishes all of it, free, and you can check any casino yourself in about two minutes. That includes the one field that tells you whether a brand is genuinely owned by the group it appears to belong to, or is just renting the licence.

One thing to get out of the way early. On 19 January 2026 the rules on UK casino bonuses changed, and the most common reason people went looking for sister sites in the first place stopped working.

And yes, we earn a commission if you open an account through a link on this page. That does not change who owns what, and every ownership claim below is checkable against a register we have no control over. We would rather you checked.

What a “sister site” actually means

“Sister site” is shorthand for three arrangements that look identical from the outside and behave very differently once you have money on the table. Almost every guide on this topic flattens them into one. Keeping them apart is the whole game.

1. Same licensee: one company, several brands

The cleanest case. One legal entity holds one Gambling Commission operating licence and runs several consumer brands on it. Sky Vegas, Paddy Power Casino and Betfair Casino all sit inside Flutter. All British Casino and Hyper Casino are both L&L Europe brands.

Two brands sharing one licence account number are legally the same licensee, whatever the branding suggests. That single fact drives everything in the consequences section below: shared verification, shared risk decisions, shared restrictions.

2. White label: a brand renting someone else’s licence

This is the category that catches people out, and it is the reason this page exists in the form it does.

A white label brand does not hold its own licence. It trades on a platform operator’s licence, platform and compliance function. The Gambling Commission defines it as a domain “operated by a licensed operator in partnership with another organisation or operator, where the operator holds the licence”. The brand you see on the shirt may be a very small business; the licensee carrying the regulatory can is somebody else entirely.

White Hat Gaming, ProgressPlay and Jumpman Gaming each run estates like this, with dozens to hundreds of consumer brands on a single licence account. SpinYoo operates under White Hat Gaming’s licence. BlueFox operates under ProgressPlay’s.

Two brands on the same white label platform are siblings in a meaningful sense – same licensee, same compliance team, often the same cashier and the same KYC queue – but they are not siblings in the sense most people mean. Nobody “owns” both in a corporate sense. They are tenants in the same building.

3. Same platform, different licensee

The weakest relationship, and the one most often mislabelled. Two casinos can share a games supplier, a payments provider, even a near-identical front end, while holding entirely separate licences and having no common owner. Identical-looking lobbies are evidence of a shared supplier, not shared ownership.

Practically, these are independent businesses. A restriction at one has no bearing on the other. If a page tells you two casinos are sisters purely because the slot menus match, it has guessed.

How to check who owns a casino in two minutes

You do not have to take our word for any of this, and you should not have to take anyone else’s. The Gambling Commission’s public register of gambling businesses is free, public, and searchable by domain name – which means you can start from the website in front of you rather than needing to know the company name first.

1. Open the Gambling Commission public register and search the gambling businesses section by the casino’s domain name.
2. Read the account name and account number on the record. That is the licensee – the entity actually answerable to the regulator, which is frequently not the name in the logo.
3. Open that account’s domain names list. Every other site on it is a sister site in the strict sense.
4. Check each domain’s status. The register marks domains as Active, Inactive or White label. That third value is the tell: it means the brand is trading on the licensee’s permission rather than being owned by it.
5. Cross-check against the casino’s own footer. UK licensees must display their licence details there. If the footer names a company you have never heard of, you have found a white label.

Two minutes of this beats any affiliate table, including ours. It is also the only method that stays correct – brands get sold, licences lapse and estates get restructured, and the register updates while published guides do not.

What sharing a licence actually means for you

Pages about sister sites almost always sell the upside: more brands, therefore more welcome offers. That is half the picture, and it is the half that costs readers money when the other half arrives unannounced.

The row worth reading twice is the third. Opening accounts across a group to claim several welcome offers is legitimate where the terms allow it, but you are transacting with one counterparty, not four. If that licensee decides your play pattern looks like bonus abuse, it can act across every brand it runs, and the accounts you were not using are not shielded from the decision made about the one you were.

The deposit-limits row is the one that gets least attention and deserves more. Setting a sensible limit on one brand does nothing on its sisters. If you hold three accounts inside one group, you have three separate limits to set, and the group is under no obligation to join them up for you.

[[EDITOR: two first-hand data points belong here and will lift this page above every competitor – (a) a measured withdrawal time from one brand versus its sister on the same payment method, and (b) whether a genuine second-account verification inside one group actually reused existing documents. Both need to come from someone who has done it. I have not, so I have not written it.]]

What changed on 19 January 2026

For years, the practical case for hunting sister sites was arbitrage. Bonus terms varied wildly between brands in the same family, so you looked for the sibling offering 20x wagering rather than the 45x on the flagship. Guides were built on that logic and most of them still are.

That logic expired. Two changes to the Licence Conditions and Codes of Practice took effect on 19 January 2026, both of them reworking Social Responsibility Code 5.1.1.

Wagering requirements are capped at 10x. The rule is blunt: licensees must not apply wagering requirements “over a maximum of 10 times”. It binds every operator holding a British licence, so the 35x and 50x offers that used to make one sibling obviously worse than another simply cannot be offered any more. The spread that made cross-brand comparison worthwhile has been regulated flat.

Cross-product promotions are banned. Offers requiring two or more types of gambling – bet on the sport, receive casino spins – are prohibited. For darts bettors this is the more noticeable change of the two. The “stake a tenner on the World Championship, get 50 free spins” construction that sportsbook-and-casino operators leaned on has gone, and sportsbook and casino offers at the same brand now stand separately. Our darts betting sites page covers the sportsbook side.

What this leaves is more interesting, not less. With wagering flattened by regulation, the things that actually separate sister brands are now game libraries, withdrawal speed, live dealer coverage, limit structures and customer service – differences that take real use to detect, and that no amount of terms-reading will surface. Any guide still telling you to pick a sibling on its wagering multiple is describing a market that stopped existing eight months ago.

UK casino groups and their brands

Below are the groups behind the casinos we review, with the relationship type stated rather than implied. Where a brand operates as a white label we say so, because the practical consequences differ. Each group name will link through to a full breakdown of that family as we publish them.

A brand marked independent has no sister casinos we would point you to – which is a feature rather than a gap if you would rather your accounts were not connected. We cover that preference properly on our online casinos hub.

What sister sites are not

A meaningful share of the people searching this term are not comparing bonuses. They are looking for a way back in after self-excluding, on the assumption that a different brand means a different door.

It does not, and it is worth being direct about why. GamStop registration has been mandatory for every UK-licensed online operator since 31 March 2020. Every licensee must check you against the central database before allowing an account to be opened or a login to proceed. One GamStop registration closes every UK-licensed brand at once – the whole estate, every sister, every white label sitting on the same licence.

Sites advertising themselves as being outside that system are outside the British licence entirely. We do not list them, we will not link to them, and the protections you are used to – dispute resolution, deposit limits, the register you were using two sections ago – do not apply there. If self-exclusion is the reason you are reading this page, GamStop and BeGambleAware are the right next click, not a casino review.

Casino sister sites: common questions

Can I claim a welcome bonus at every sister site?

Sometimes. It depends on whether the group writes its eligibility clause per brand or per corporate group, and both models are in use across the UK market. The clause you are looking for usually sits in the first three lines of the bonus terms and names “the group” or “affiliated companies”. Where it does, one offer is all you get, and opening further accounts to get around it is treated as abuse.

Is it legal to hold accounts at several sister sites?

Yes, provided each account is in your own name and you are not breaching a one-per-group bonus term. What is not permitted is multiple accounts at the same brand, which is a straightforward terms breach and the usual reason for confiscated winnings.

If one casino closes my account, will its sister sites too?

Within a single licensee, very possibly. Closure decisions taken for risk, responsible gambling or suspected bonus abuse are made by the licensee, and the licensee runs every brand on that account. Across genuinely separate companies that happen to share a platform, no.

Do sister sites share the same games?

Largely, yes, because they usually share a platform and therefore a supplier list. Libraries are rarely identical though – brands licence content separately, and exclusives and jackpot networks vary. The lobby is the fastest way to tell two siblings apart.

How do I find a casino with no sister sites?

Run the register check above and look at the domain list on the licence account. An operator holding one licence with a single active domain has no siblings. Several brands in our table sit in exactly that position.

Are sister sites safer or riskier than standalone casinos?

Neither by default. What matters is the licensee’s compliance record, not how many brands it runs. A large group with a clean enforcement history is a safer counterparty than a single-brand operator with a poor one, and the register records regulatory action against the licence account – so the same two-minute check answers this question too.

Last reviewed September 2026. Ownership details change; the Gambling Commission register is authoritative and we recheck this page against it quarterly. 18+. Please gamble responsibly.