Boris Johnson has been left desperately trying to shore up his premiership after the Sue Gray report as detectives were revealed to be investigating 300 photos and 12 events in Downing Street, including a party in the prime minister’s private flat.

Johnson faced a wall of anger from Conservative MPs in the House of Commons after Gray’s investigation concluded that many of the 16 parties were “difficult to justify” and condemned “failures of leadership and judgment” in No 10 and the Cabinet Office.

Scotland Yard officers have obtained more than 300 photographs and 500 pages of documents. The images include pictures taken at alleged parties and from security-system cameras showing people entering and exiting buildings.

Tory grandees were among those who made stinging interventions criticising Johnson’s conduct, with his predecessor, Theresa May, questioning his comprehension of the rules and the former chief whip Andrew Mitchell saying the prime minister no longer had his support.

Deputy Prime Minister Dominic Raab defended his boss, telling BBC Radio 4's Today programme he had "expressed contrition for his overall responsibility", and had a plan to fix the running of No 10.

But fellow Tory MP Andrew Mitchell told the same programme the PM was running government like a "medieval court", and he was doing "great damage" to his party.

Boris Johnson is focused on "saving his own skin" rather than key issues, after findings into No 10 lockdown parties were published, Sir Keir Starmer says.