Former chancellor Rishi Sunak and Leader of the House Penny Mordaunt have emerged as the main contenders.
Tory leadership
Boris Johnson pulls out of race for 10 Downing Street
The former prime minister admitted he cannot unite the warring Conservative Party.
Johnson’s team claim he has the numbers to get on the ballot paper
Rival camps react with suspicion in the absence of a formal declaration from the ex-PM that he is standing.
Rishi Sunak, predictor of chaos, takes another tilt at No 10
The ex-chancellor lost out to Liz Truss in the last leadership contest just six weeks ago after warning her tax plans would bring turmoil.
Penny Mordaunt hopes to work her magic in second leadership bid
Long before she sought to replace Boris Johnson, let alone his successor, Penny Mordaunt had been tipped as a potential challenger for the Tory crown.