The next time the prime minister stumbles, his former deputy will be primped and primed – and in spite of the best efforts of Wes Streeting and his undeclared leadership campaign, says John Rentoul K eir Starmer fought back from the political equivalent of the intensive care unit yesterday, and tried today to tell people at a community centre in Hertfordshire that he was feeling fine. His second speech of a lifetime in as many days – the first being his address to the parliamentary Labour Party