Three years ago Sir Keir Starmer seriously considered quitting as Labour leader. It was 2021 and his party had just lost the Hartlepool by-election to Boris Johnson’s Conservatives. It was the first time Labour had ever lost the seat. Three short years feel like a political lifetime ago now. Sir Keir has become only the fifth person in British history to take Labour from opposition to power. His party has gone from a historic thumping at the general election in 2019 – to victory in...