Suella Braverman accused Rishi Sunak of having “manifestly and repeatedly failed to deliver” on key policies and said his “distinctive style of government means you are incapable of doing so”, in a stinging letter after she was asked to resign.In her letter to the Prime Minister, Mrs Braverman accused Mr Sunak of a “betrayal” of his promise to do “whatever it takes” to stop small boat crossings by failing to override human rights concerns about the Rwanda plan.