Paul Anderson, who has been in post for 10 months, is under investigation for alleged inappropriate behaviour

A chief constable has announced his retirement after being told he was under investigation for alleged inappropriate behaviour after complaints by junior staff, the Guardian has learned.

On Tuesday Paul Anderson’s retirement as leader of Humberside police was announced, just 10 months after taking the role.

Force says Gambling Commission has passed it information alleging more police placed bets relating to date of poll

• UK election live – latest updates

The Gambling Commission has uncovered information alleging that five more Metropolitan police officers placed bets on the date of the general election.

The Met confirmed the latest allegations in a statement, which comes a week after it announced that a protection officer guarding the prime minister, Rishi Sunak, had been arrested for allegedly placing a bet on the election date.