Sir Keir Starmer has created, from nowhere, a pivotal by-election by his own hand. He owns the outcome, because of his decision to block Andy Burnham - someone voters on the streets of Denton and Gorton thought by far to be the strongest candidate. And nobody can anticipate the result, which Labour MPs think could trigger a coup against the prime minister should Labour come third. You need javascript enabled to view this content 3:05 Enable javascript to share Share Can Labour win Manchester by-