Sue Gray report: Boris Johnson ‘sorry’ after report says No 10 parties ‘represent a serious failure’ and ‘difficult to justify’

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, the Guardian understands.

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.

Angela Richardson, a Tory aide, said she had resigned her government job last week citing “disappointment” with the prime minister, while Aaron Bell, an MP from the 2019 intake, gave an emotionally charged speech accusing Johnson of making him look like a fool after he stuck to the rules during his grandmother’s funeral.