Rishi Sunak

The watchdog said GB News had broken 'due impartiality rules' following an interview with the former prime minister earlier this year.

Stephen Burke's letter called the then-prime minister and his wife racial slurs, and included threatening phrases like "we're after you".

In a speech at the party's conference in Birmingham, Sunak said he had one final "ask" - for members to get behind whoever wins the contest to replace him.