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How we find casino sister sites for UK players

You can check our work on every page of this site. This one says what we read before we call two casinos sister sites, in what order, and what we leave out when the evidence is not there.

The short version

We call two casinos sister sites when the same company runs both, or when one is run by the parent group of the other on a separate licence. The link has to come from the casinos' own pages and the licence register, never from another site's list.

Three readings decide it: the company a casino says operates it, the licence its terms name, and whether those terms accept UK players. What the register lists under that licence account then decides which brands belong in one family.

Our team tests the casinos and checks every fact before a page is published. Nothing on a casino page rests on a claim we have not read at its source, and every casino we have checked is listed in one place.

The operator, from the casino's own pages

The operator line is the one fact a sister page cannot be written without, and it comes from the casino's own words. We read the terms and conditions first, then the footer of the home page, and take the company name from whichever states it. Check that line on any casino you use: it is the quickest way to see which other sites are run by the same company.

MrQ's terms say the site is operated and managed by Tek Fox Ltd. Dream Jackpot's name Jupiter Gaming Limited. Spin Genie and PlayOJO both name Skill on Net Ltd, which is why those two sit in one family here.

A parent group counts as well, on its own evidence. 888 Casino's terms name 888 UK Limited and say the company is part of Evoke plc, so its page covers 777, which shares its licence, and William Hill, which shares its parent group.

The licence, from its own terms

Every casino here names its licence in its own terms, and that account is what ties brands together. The Gambling Commission is plain about what it covers: "We license and regulate the individuals and businesses that provide gambling in Great Britain, including the National Lottery."

We take the account from the terms, then read the Commission's business detail and domain-name pages for it. Account numbers stay off our pages, because the company name is the part you can act on.

The UK in the terms

A casino only gets a page here when its own terms accept UK players. We read the restricted-country clause rather than the welcome banner, because the clause is what the casino will hold you to.

The wording is not the same everywhere. Mr Vegas's terms require residence in the United Kingdom, while Spin Genie's allow players from Great Britain, and the Gambling Commission licenses Great Britain. If you live in Northern Ireland, read that clause before you register: it decides whether you can hold an account at all.

Every fact has a date

Every casino page carries the date its facts were read, at the top of the page. The MrQ page was read on 30 September 2026, and the register pages behind these families on 27 and 28 September 2026.

A date is not a promise. Terms change without notice and an offer can move the week after we read it, so check the casino's own terms before you deposit and treat an older date as a reason to look twice.

How we rate

Every casino we review carries a rating, and it comes from the same criteria in the same order, scored against what the casino's own terms say. Bad findings move ratings; commercial deals never fix a position.

In order, the criteria and their weights are Bonuses 20, Payments and speed 0, Games 20, Account and safety 15, VIP and loyalty 10, Support 10 and Mobile 5.

Payments and speed is shown for information and not scored, so what a casino states about deposits and pending periods never lifts or lowers its mark. The scored weights come to 80, and the weighted result is scaled to a rating out of five.

Read the criteria that matter to you rather than the rating on its own. The weights are ours, and a casino that scores well overall can still be weak on the one thing you came for.

What we leave out

Casinos get called sisters on nothing more than a shared look or a shared games list, and we leave those out. Without an operator line on the casino's own pages, or an entry under the same licence account, there is nothing to stand on, and we would rather say we could not confirm it than pass on someone else's pairing.

MrQ is the clearest case. The register lists one brand under its account, so the page says MrQ has no sister sites and reviews alternatives instead, named as alternatives and nothing else.

We leave out what a casino never states, too: a launch year, a software platform, a parent company, a count of games. A gap stays a gap on the page.

If you think we are wrong

Tell us and we will read it again. Email info@octomark.co.uk with the page, the line you are questioning and what you saw instead, and we will go back to the casino's own terms and to the register before we correct the page or explain why it stands.

If the problem is with a casino rather than with this page, we cannot settle it for you. Complain to the casino first and follow its own complaints process; if its answer does not settle the matter, after 8 weeks you can take the complaint to the Alternative Dispute Resolution provider the casino names in its terms.

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