Sir Keir Starmer had to drop his “student” ideas when he became leader to prove to Britons that he can be a Prime Minister, his close ally Jenny Chapman says in a swipe at Labour leftwing activists. Chapman also suggested that Labour might not campaign for an outright ban on zero hours contracts at this year’s expected general election after all but rather publish a “framework that works for everybody”. The Labour leader has been heavily criticised for “flip-flopping” and dropping a number of pledges he made in the leadership contest triggered by the resignation of Jeremy Corbyn. These include…