Bury South MP Christian Wakeford has said Boris Johnson is "living on borrowed time" as he hit out at the prime minister for "poisoning the Tory Party from top to bottom”.
Mr Wakeford, who became the first elected Tory in the Greater Manchester constituency for more than 20 years in 2019, defected from the Conservatives to Labour on Wednesday.
He later claimed that he was threatened about the loss of a school in his constituency if he did not toe the line.