Boris Johnson has pulled out of the race to be the next Tory leader.
The former PM withdrew from the contest on Sunday evening, announcing it was “not the right time” for him to attempt a comeback.
This leaves Rishi Sunak as the firm favourite for the job.
Former Chancellor Sunak has just one remaining rival in the contest – House of Commons leader Penny Mordaunt.
Any candidate hoping to succeed Truss requires the support of 100 fellow Tory MPs by the time nominations close on Monday at 2 p.m. Sunak already has more than 140 public declarations of support, Mordaunt had fewer than 30.