Four senior aides in Downing Street have resigned on Thursday, followed by a junior aide on Friday. Munira Mirza, the head of policy at Number 10, was the first to quit on Thursday over Prime Minister Boris Johnson’s failure to apologise about his ‘scurrilous’ remarks toward the opposition leader, Labour’s Sir Keir Starmer. Mirza’s departure was followed on Thursday by the resignations of Jack Doyle, Downing Street director of communications; Martin Reynolds, Johnson’s principal private secretary; and Dan Rosenfield, No 10 chief of staff. A junior aide, education policy specialist Elena Narozanski, resigned on Friday morning. According to the Daily Mail, where Doyle previously worked, Doyle told his colleagues that the past weeks had “taken a terrible toll” on his family life, and stressed that he had always intended to leave the job after two years. Mirza’s role was swiftly filled by Conservative MP Andrew Griffith, while No 10 said it was very sorry to …