Britain's Macolin decision

A treaty laid before Parliament in June

The United Kingdom signed the Council of Europe Convention on the Manipulation of Sports Competitions in December 2018. It has never ratified it. The Convention, usually called the Macolin Convention, entered into force internationally on 1 September 2019, and Britain has spent almost seven years as a signatory that has not joined.

That changed procedurally on 4 June 2026, when the Government laid the Convention before Parliament and started treaty scrutiny. The scrutiny deadline was later extended to 12 October 2026. The House of Lords International Agreements Committee took oral evidence in three sessions, on 9, 14 and 21 July 2026. As of early September 2026 the Committee had not published its report.

So the decision is live, the window is short, and the outcome is not yet knowable. What can be described accurately is what the Convention requires, what the sessions put on the record, and what would actually change inside a British federation or league.

What the Convention requires

Macolin is the only binding international treaty on competition manipulation. It obliges parties to criminalise manipulation, to run a national platform that shares information between sport, betting regulators and law enforcement, and to place education and reporting duties inside sports organisations.

According to a Mishcon de Reya update of 17 July 2026, there are 43 signatories and 17 ratifications. Treat that count as sourced to that update rather than as a settled figure.

Britain already has parts of the architecture. Operators serving Great Britain must report suspicious betting to the Gambling Commission's Sports Betting Intelligence Unit under their licence conditions, and the Commission publishes a Betting Integrity Decision-Making Framework. The current licence conditions edition took effect on 6 April 2026. There is a Sports Betting Integrity Forum. The statutory levy on gambling operators came into force on 6 April 2025 at between 0.1 and 1.1 per cent of leviable amounts, replacing voluntary contributions, with a target of £100 million.

Anyone arguing that ratification would build British sports integrity from nothing is overstating the case. Anyone arguing that it would change nothing is understating it.

What the three sessions put on the record

The first session, on 9 July 2026, heard from Prof. Madalina Diaconu of the University of Neuchatel and from GAMECHANGER360's founder, Moses Swaibu, who argued that the UK should join. His evidence dealt with how prediction markets and frictionless betting have widened the attack surface, and with what education has to cover to be useful: recognising warning signs, reading behaviour, and the soft skills that make a player able to refuse.

The second session, on 14 July, heard from Karen Moorhouse, Chief Executive of the International Tennis Integrity Agency, Nigel Mawer QPM, Co-Chair of the Sports Betting Integrity Forum, and John Pierce, Director of Enforcement and Intelligence at the Gambling Commission. Their theme was that the person who fixes a match is often the person a criminal network has selected and cultivated, and that enforcement effort belongs on the corrupters.

The third session, on 21 July, heard from the Department for Culture, Media and Sport: Emma Floyd, Director of Sport and Gambling, and Simon Mason, Deputy Director of Sport. Floyd reported 28 per cent more corruption instances in 2025 than in 2024.

Across the sessions, the evidence covered manipulation in darts, chess and skiing, the lower tiers of football and tennis being targeted by international criminal networks, and those networks using sports manipulation both to generate profit and to launder proceeds. That last point is the one most often missed. A fixed match in a fourth tier is not only a betting fraud. It can be a cash-cleaning mechanism.

What would actually change for a UK federation

Four things, in order of how quickly they would be felt.

A defined counterparty. A national platform is not a hotline. It is a standing arrangement in which a federation knows which body receives what information, on what timescale, and what comes back. Today a British federation that receives a report of an approach in a lower division has to decide, case by case, who to tell. Under a ratified Convention that route is defined.

Cross-border reach becomes reciprocal. Manipulation in the lower tiers is organised across jurisdictions. A federation currently relies on the goodwill of counterparts and the coverage of commercial monitoring suppliers. Parties to the Convention owe each other cooperation.

Internal duties become externally visible. Education, reporting channels and record-keeping stop being matters of internal policy and become the subject of obligations that someone else can assess. That is uncomfortable, and it is the mechanism by which the Convention actually bites.

Your own records acquire an audience. If a case moves into a criminal process, the notes of how a report was received, escalated and handled are part of the picture. Files kept as informal internal memory do not hold up under that reading.

What is still unknown

The Committee has not reported. Ratification is a decision for the Government, not for the Committee. There is no published Government timetable beyond the scrutiny deadline. And no one has published an assessment of what a UK national platform would cost or which body would host it.

There is also no basis in the public record for predicting an outcome. Signature in 2018 followed by seven years of non-ratification is itself evidence that the question is contested inside Whitehall.

What to do before 12 October

If you run a federation, a league or a competition in Britain, do three things this month.

Write down your current escalation route for a report of an approach, with names and timescales. If you cannot write it in a page, you do not have one.

Check whether your integrity rules impose reporting duties on participants and staff, or merely prohibit conduct. The Convention model assumes duties.

Read your last twelve months of integrity records as if a prosecutor were reading them. Ratification would not create that scrutiny, but it would make it likelier.

Watch for the Committee's report, and read what it says about the national platform rather than what it says about the principle.

Sources

• UK Parliament, House of Lords International Agreements Committee
• Council of Europe
• Gambling Commission