Yvette Cooper and Zarah SultanaHome secretary Yvette Cooper rejected former Labour MP Zarah Sultana’s attacks on the government this morning.Sultana announced last night she was quitting Labour, a year after she was suspended for voting against the government’s plans to keep the two-child benefit cap.As she declared she was setting up a new party with former Labour leader Jeremy Corbyn, the MP for Coventry South said the government had “completely failed to improve people’s lives”.She claimed that’s why Nigel Farage’s