Boris Johnson would be a "permanent nightmare" for whoever succeeds him in Downing Street and will want "revenge", a former Tory leader has said.
William Hague said the outgoing Prime Minister "lives his life as a performance" and he was likely to be a thorn in the side of either Rishi Sunak or Liz Truss in future.
The pair are slugging it out to become the next PM in the September in an increasingly bitter race to win the support of Tory members.
