Sunak’s chief of staff questioned by Gambling Commission

The Prime Minister was pressed during a campaign visit to Derbyshire over what he had told Mr Williams, but said it would not be “right” to comment.

Told that he could not prejudice an investigation by the gambling watchdog, an independent body, he suggested that commenting would “compromise” it.

“It’s absolutely not right when there are ongoing independent investigations that those are compromised in any way shape or form,” Mr Sunak said.

His remarks came as the Gambling Commission announced it is making “rapid progress” with its investigation into bets on the timing of the election.

Andrew Rhodes, the head of the watchdog, said its inquiry was focused on “confidential information being used to gain an unfair advantage”.

“Our enforcement team has made rapid progress so far and will continue to work closely with the Metropolitan police to draw this case to a just conclusion,” he said.

Scotland Yard also announced that seven police officers are now under investigation in relation to alleged bets on the timing of the election.

They include one of Mr Sunak’s close protection officers who is under investigation for misconduct in public office over allegedly placing a wager.