A police officer in Rishi Sunak’s close protection team has been arrested and suspended over alleged bets about the timing of the general election.

The police constable from the Met’s Royalty and Specialist Protection Command was arrested on 17 June on suspicion of misconduct in public office after the betting watchdog contacted the force last Friday.

The officer was taken into custody and bailed pending further enquiries, with the case being referred to the Independent Office for Police Conduct, according to the Met.

In a separate case last week, a senior aide to Mr Sunak admitted the betting watchdog was making inquiries after he reportedly placed a bet on the date of the general election.

Tory candidate Craig Williams, who was the prime minister’s Parliamentary Private Secretary in the last Parliament, said he would cooperate with the probe.

Mr Williams – who is standing for election in Montgomeryshire & Glyndwr – placed a £100 bet on a July election just three days before Mr Sunak named 4 July as the date, according to The Guardian.

A Scotland Yard spokesperson told The Independent: “We can confirm that on Friday, 14 June, the Met were contacted by the Gambling Commission who informed us that they were investigating alleged bets made by a Police Constable from the Met’s Royalty and Specialist Protection Command, which were related to the timing of the general election.

“The matter was immediately referred to officers in the Met’s Directorate of Professional Standards, who opened an investigation, and the officer was also removed from operational duties.

“The officer was subsequently arrested on Monday 17 June on suspicion of misconduct in public office. He was taken into custody and bailed pending further enquiries. The matter has also been referred to the Independent Office for Police Conduct.

“The Gambling Commission continues to lead the investigation into the alleged betting offences, and our investigation is running in parallel to that.”

A Gambling Commission spokesperson added: “The Gambling Commission regulates gambling in the interests of consumers and the wider public.

“Currently the commission is investigating the possibility of offences concerning the date of the election. This is an ongoing investigation, and the commission cannot provide any further details at this time.”

Liberal Democrats deputy leader Daisy Cooper said: “Rishi Sunak must call a Cabinet Office inquiry into what is shaping up to be yet another scandal at the heart of Government.

“This stinks of yet more sleaze and answers are needed. An inquiry is needed to understand who knew what and when.”