Explainer

What happens behind a licensed casino site

A UK online casino is more than a colourful lobby. Under the surface, licensed operators run audited software, segregate player funds and answer to the UK Gambling Commission. Understanding that machinery helps you judge whether a brand is run seriously — which is what our comparisons aim to surface.

Random number generators

Digital slots and virtual table games rely on a random number generator (RNG) — software that produces unpredictable outcomes for each spin or hand. Licensed suppliers must have their RNGs tested by independent labs such as eCOGRA, GLI or iTech Labs before games go live on UK sites.

Live dealer games are different

Live blackjack and roulette stream from studios with physical cards and wheels. The outcome is determined by real equipment, not an RNG, though the video feed and bet interface still run on certified software. Studios like Evolution and Playtech build dedicated floors for this purpose — which is why live casino quality varies so much between operators.

Licensing and oversight

The UK Gambling Commission issues licences with conditions on fairness, anti-money-laundering checks, advertising standards and mandatory player-protection tools. Operators must submit regular reports and can face fines or licence reviews if they fall short.

Game suppliers vs operators

Most casinos do not build their own slots. They integrate games from studios — NetEnt, Pragmatic Play, Microgaming and dozens more — via platform aggregators. The operator chooses which studios to host; the studio remains responsible for the maths model and RTP setting of each title.

What this means for comparisons

When we rate game variety, we are really rating which studios an operator has contracted and how well those games are presented in the lobby. A deep catalogue from respected suppliers is a sign of a serious product investment — not a guarantee of winning, but of a properly run platform. See our current operator showcase for how the six listed brands compare.