Former senior civil servant Sue Gray, who became a household name as the Partygate investigator, is at the centre of fresh controversy over the revelation she is paid more than her boss - the prime minister.

Sue Gray asked for and was given a salary of £170,000 - £3,000 more than the PM and more than any cabinet minister – or her Conservative predecessor

The Downing Street Chief of Staff was previously tasked with investigating breaches of the Covid-19 restrictions in the government