Conservative Party
The prime minister is under pressure to urgently improve his party's fortunes.
Transport secretary Mark Harper was asked if he was "embarrassed" about taking donations from Frank Hester.
Conservatives believe the prime minister is "certain" to face a leadership challenge in weeks.
Holly Valance also revealed she was not vaccinated against Covid.
The prime minister has ruled out sending the nation to the polls on May 2.
James Heappey becomes the 62nd Conservative MP to say they are standing down at the election.
It comes as the Israel-Hamas war continues to rage on in Gaza and the Tories languish in the polls.
The announcement comes after months of speculation and means voters are likely to go to the polls in the autumn.
The party is under fresh pressure to return Frank Hester's money.
Michael Gove promised it would "protect our democratic values" – but not everyone agrees.