Kemi Badenoch has accused the former Post Office chairman of having “changed his story” about his sacking over the handling of the Horizon scandal. In a letter to the Commons business and trade committee, seen by this newspaper, the Business Secretary said “it should be noted” that the executive appeared to have dropped a claim that she told him: “Well, someone’s got to take the rap for this.” Henry Staunton is due to appear before the committee on Tuesday in the latest escalation of a bitter ro