UK Gambling Commission Faces Fresh Uncertainty Following Tim Miller’s Exit

Key Points

• Tim Miller, the Gambling Commission’s executive director of policy and research, will leave in September 2026 after ten years in the job.
• His exit follows that of former chief executive Andrew Rhodes, leaving the regulator without a permanent CEO or chair as it heads into one of its most consequential periods.
• Miller built the Commission’s flagship harms survey and chased Big Tech over black market gambling ads, work his successor will now have to pick up cold.

A Decade In, Miller Calls Time

Tim Miller has decided ten years is enough. The executive director of policy and research at the Gambling Commission of Britain announced via LinkedIn that he will be retiring in September 2026, bringing to an end his career that has influenced most of Britain’s gambling regulations to date.

He did not dress it up. “Today I announced to my colleagues that after a decade at the Gambling Commission, I’ve decided it’s time for my next chapter,” Miller wrote, adding that the Commission “has been the most enjoyable and fulfilling part of my career so far” and that working alongside such dedicated colleagues had made the decision a genuinely hard one. Still, a decade felt like the natural cut-off point, he said, and he is ready for something new.

What comes next will pull him away from Britain entirely. Miller is heading into an international advisory role, supporting governments and regulatory bodies abroad as they build out their own gambling oversight systems. He has been characteristically tight-lipped on specifics. Speaking to iGaming Business, he said only that he is “looking forward to working for myself,” promising more detail once his last day at the Commission has actually arrived.

A Regulator Already Stretched Thin

Here is where the timing bites. Miller’s departure lands just months after former chief executive Andrew Rhodes left the Commission at the end of April, a move Rhodes himself addressed at February’s Betting and Gaming Council AGM, acknowledging “a measure of uncertainty” hanging over the regulator as it juggled budget pressures, fee changes and the slow grind of implementing the Gambling Act Review. Rhodes has since resurfaced at Hawkbridge, a London consultancy advising operators on exactly the kind of regulatory questions he used to answer from inside the Commission, a career pivot that has not gone unremarked upon within the industry.

So the Commission now finds itself hunting for a new executive director while it is still without a permanent chief executive and still without a permanent chair. Acting chief executive Sarah Gardner has been left holding the fort, and her tribute to Miller was warm but brief: “Tim has provided outstanding service to the Commission for ten years. I would like to thank Tim for his significant contribution to gambling regulation and wish him every success in the future.”

Three vacancies at the top of one regulator, all converging at once, is not a coincidence. Anyone in the sector is comfortable shrugging off, particularly given how much is still sitting on the Commission’s desk.

The Unfinished Business He Leaves Behind

Miller joined the Commission back in 2016 under then-chief executive Sarah Harrison, arriving with a brief to build out a proper evidence base for gambling policy. He delivered. He is known to have initiated the UK’s Gambling Survey of Great Britain which he is credited with coming up with and launching despite criticism that his approach overstates participation and harm statistics. He is also responsible for setting up GamProtect, which is a data-sharing program among licensed operators who use it to identify and limit the betting activity of customers exhibiting potential gambling problems. He is also known to have set up the Digital Advisory Panel in order to ensure the regulator doesn’t fall behind technological advances.

Then came the heavier lift: turning the 2023 Gambling Act Review White Paper into actual rules. Age verification, financial vulnerability checks, limits on game design, tighter controls on direct marketing, all of it ran through Miller’s desk at some point. Not every measure landed cleanly. Financial risk assessments, the affordability checks the industry insists on calling them, remain stuck in pilot limbo. The Commission confirmed last month that implementation is being delayed again while it works through further evidence, even as it maintains that 97% of customers who trigger a check would barely notice it happening. Operators and horse racing bodies are not convinced, and the Betting and Gaming Council has called for any future proposal to be “genuinely frictionless” before it gets industry buy-in.

Crypto payments are another loose thread Miller leaves dangling. He told the BGC’s February AGM that an industry forum had been tasked with working out how digital assets might eventually function as a regulated payment method for British gambling, conceding there would be “significant challenges and risks to overcome” before that becomes workable.

The Fight He Made His Own

If there is one battle people will remember Miller for, it is his public scrap with Big Tech over illegal gambling advertising. He went after Meta by name on the iGaming Daily podcast this month, pointing out the absurdity of billionaires racing to colonise Mars while claiming they cannot stop unlicensed betting ads slipping through their own platforms. “If they don’t play their role, and frankly they’re not at the moment, it massively undermines the efforts that the rest of us are putting in place,” he said, a line that summed up his frustration with platforms from Instagram to YouTube to Kick.

The Commission picked up an extra £26 million from the Treasury to fund that fight and used it to help stand up the government’s Illegal Gambling Taskforce, which Miller sat on and partly chaired. Forecasts suggest the UK black market could swell past £33 billion by 2028, which gives his successor very little room to ease off.

Before any of this, Miller had spent years moving through public sector watchdog roles, including stints at the Law Society of England and Wales and both the Parliamentary and Local Government ombudsman services, the kind of background that explains why colleagues describe him as a regulator rather than an industry lifter.

Expert Analysis: A Leadership Vacuum Nobody Wanted

Losing one senior figure during a regulatory overhaul is awkward. Losing your chief executive and your policy chief in the same year, with the chair’s seat still empty too, starts to look like something closer to institutional drift. The next person to be appointed by the Commission will have inherited many issues including the lack of resolution regarding the issues of affordability, a black market developing at a much quicker pace than any budget for enforcement could ever catch up with, and an industry that has been complaining for years about not getting a clear idea about the costs of compliance. The evidence machine used by the Commission in almost all decisions was constructed by Miller.