Sir Gavin Williamson is being investigated over abusive text messages to a colleague in which he complained about not being invited to the Queen’s funeral.
It's also alleged that Mr Williamson, 46, warned "there is a price for everything" in the expletive-ridden texts, sent on September 13 to Wendy Morton, then chief whip.
And the former Education Secretary was given a new role last month despite Jake Berry, the chairman of the Conservatives at the time, saying that he personally told Rishi Sunak about the complaint.