Illegal Gambling Sites in the UK: Enforcement Figures for 2026

Illegal gambling sites UK enforcement stepped up sharply in 2026. Between April and September 2026 the Gambling Commission sent 763 cease and desist letters to illegal operators and had more than 3 million URLs removed from search engines, more than in the whole of the previous year. This guide sets out the official figures and how to tell a licensed site from an illegal one.

The size of the illegal gambling sites UK problem

Under the Gambling Act 2005 it is illegal to offer gambling to consumers in Great Britain without a Gambling Commission licence, wherever in the world the site is run from. A licence issued in another country does not allow an operator to serve British customers, which is why “unlicensed” and “illegal” are used interchangeably.

There is no official estimate of how much is staked on the illegal market. The Commission says research into it is complex, and it measures its impact through disruption figures instead.

The licensed market it protects is large, with gross gambling yield of £17,455.7m in 2025-26 according to our UK gambling industry statistics. Illegal operators pay no tax, no levies and no funding for sport.

Many unlicensed casinos UK players come across are offshore casinos holding a licence from another jurisdiction. For a GB customer, that foreign licence counts for nothing under British law.

What the Gambling Commission does against unlicensed casinos UK

The Commission’s Illegal Markets Team targets what unlicensed operators need to work at scale: payments, advertising, technical infrastructure and the ability to keep customers. Its main tools are cease and desist letters, referrals to search engines, and referrals to domain registrars and hosts.

The 2025-26 and 2026 totals are our sums of the Commission’s quarterly impact metrics. In July to September 2026 alone, 7,677,211 URLs were referred to search engines and 3,019,291 were removed, by far the highest quarter on record.

Since April 2024 the team has issued 3,140 cease and desist and disruption notices, including 774 registrar referrals and 402 host referrals, according to a report updated in March 2026. Operators also geo-blocked 228 websites from GB users in 2025-26 after contact from the Commission.

Criminal action is still rare. In 2025-26 the Commission started two criminal investigations and brought one prosecution, and it started four more investigations in July to September 2026, a small number set against the cost of gambling harm.

Gambling Commission fines on licensed operators

Most Gambling Commission fines fall on licensed operators that break their licence conditions, not on illegal sites. In 2024-25 the Commission took enforcement action against 24 operators, leading to £4.2m in fines or regulatory settlements.

The Trust Statement 2024-25, published in January 2026, shows the largest single penalty was £686,000. The 2023-24 total was driven by one exceptional £6.0m case.

Licensed operators also face rules that unlicensed operators ignore, such as online slots stake limits. In the Commission’s 2024-25 compliance assessments, 19.72% of licensees showed significant failings on consumer protection and 33.80% were rated good.

Affiliates promoting sites outside GamStop

Advertising unlawful gambling to consumers in Great Britain is a criminal offence without a valid defence. That puts affiliates, the websites and social media accounts paid to send traffic to operators, firmly in scope.

The Commission sent 352 cease and desist letters to advertisers and affiliates in 2024-25, and 247 in 2025-26. In April to September 2026 it sent another 242.

Much of this marketing promotes casinos outside GamStop to people who have self-excluded. GamStop covers every online operator licensed in Great Britain, so a site that accepts a self-excluded British player without a GB licence is operating illegally.

How to check a Gambling Commission licence

Before you gamble, check that the business has a Gambling Commission licence. Licensed sites must display that they are licensed and link to the Commission’s public register.

• Find the licence statement, usually in the site footer, and follow the link.
• Search the public register for the company name and account number.
• Check that the licence covers the activity offered, such as remote casino or betting.
• Look at the register for any past regulatory action.

Sites promoted as casinos without ID checks are a warning sign for British players. Age and identity checks for online gambling were tightened in GB, so an operator that skips them is not following GB rules.

A site that has no licence statement, or whose register entry does not match its name, should be treated as unlicensed. Suspected illegal gambling can be reported through the Commission’s “report something in confidence” service. It also covers underage gambling, money laundering and match fixing.

Risks to players

A GB licence means consumer and gambling protection rules apply. On an illegal site, there is no regulator to enforce fair games, complaints, self-exclusion or the safe handling of deposits.

The Commission also warns that illegal operators can pose an integrity threat to sport and may have links to wider criminality. If a dispute arises, a British player has no GB body to turn to.

Payments are another gap. Credit card gambling has been banned in Great Britain since 14 April 2020, after research found 22% of online gamblers using credit cards were problem gamblers, so casinos that take credit card payments from British players are not licensed here.

A Commission analysis of anonymised banking data, published in October 2026, found that 45% of people with a detected payment to an illegal operator had a PGSI score of 8 or higher, against 6% of all licensed gambling consumers. Most kept using licensed sites at the same time, and the study cannot show cause and effect.

Players who self-excluded through GamStop lose that protection if they move to unlicensed operators. Free help is available, and our guide to gambling treatment UK explains how services work.

FAQ: illegal gambling sites UK

Short answers from Gambling Commission reports and impact metrics.