Sir Keir Starmer could face a leadership challenge in the coming days after Wes Streeting quit as health secretary in a scathing letter criticising the prime minister’s premiership. The Labour leader has insisted he will not resign amid the fallout from last week’s disastrous local election results, which were the worst on record for the Labour Party. However, nearly 100 of his own MPs have now spoken out against him, as potential leadership challengers are understood to be lining up for a contest. Mr Streeting – widely seen as a leadership hopeful – did not suggest he intended to challenge the prime minister in his letter, but he did urge him to set a timeline for his departure. Hours earlier, former deputy prime minister Angela Rayner announced she had been cleared of deliberate wrongdoing over her tax affairs. Ms Rayner did not rule out running in a Labour leadership race, but told The Guardian she would not trigger a contest.…