Health Secretary Matt Hancock has defended Priti Patel as “courteous” following bullying claims made by the ex-top civil servant in her department.
Sir Philip Rutnam, the Home Office’s most senior official, resigned on Saturday citing a “vicious and orchestrated” campaign against him.
Labour’s Sir Keir Starmer said Ms Patel must come to Parliament to “explain”.
The home secretary has not publicly responded to Sir Philip’s claims but previously denied she mistreated staff.
In his statement, Sir Philip said he received allegations that Ms Patel’s conduct towards employees included “swearing, belittling people, making unreasonable and repeated demands”.
He said he now intended to take legal action against the Home Office on the basis of constructive dismissal.