Liz Truss was elected Tory leader by the party's membership. MPs were, by and large, not very happy about it. Sunak was expected to win. Truss did what she did,

Liz Truss was elected Tory leader by the party's membership. MPs were, by and large, not very happy about it. Sunak was expected to win. Truss did what she did, her MPs turned on her, and she was forced to resign. Then there was another leadership contest with different rules which, after some horse trading between potential candidates, didn't give party members a vote and resulted in the uncontested appointment of the person the MPs wanted all along—Rishi Sunak. This does not sit well with some party members, although calling it a coup is excessive.