Mr Johnson was forced late on Sunday to admit he could not unite his warring party, seemingly surrendering to Rishi Sunak.
Downing Street
Who are the contenders for the next leader of the Tory Party?
Former chancellor Rishi Sunak and Leader of the House Penny Mordaunt have emerged as the main contenders.
Boris Johnson pulls out of race for 10 Downing Street
The former prime minister admitted he cannot unite the warring Conservative Party.
Sunak will be just as bad as Johnson for Scotland, says Ian Blackford
The SNP Westminster leader’s comments come after Boris Johnson’s dramatic withdrawal from the Tory leadership contest.
Rishi Sunak promises ‘integrity and professionalism’ as he enters Tory race
The former chancellor became the second candidate to declare their prime ministerial ambitions.