Mr Johnson was forced late on Sunday to admit he could not unite his warring party, seemingly surrendering to Rishi Sunak.
Conservative
Rishi Sunak promises ‘integrity and professionalism’ as he enters Tory race
The former chancellor became the second candidate to declare their prime ministerial ambitions.
Rishi Sunak ‘wins enough support to progress in Tory leadership campaign’
The former chancellor is the first candidate to be the next prime minister believed to have reached the 100-nomination threshold.
‘Up for it’ Boris Johnson flying back from Caribbean to run for prime minister
Having resigned in disgrace just six weeks ago, Mr Johnson was attempting an extraordinary comeback.
Rishi Sunak ‘first contender to pass threshold of 100 Tory MPs’
Former PM Boris Johnson was lagging behind, as was Commons Leader Penny Mordaunt.
Boris Johnson jets back to UK as Tories split on his expected leadership bid
The former prime minister cut short a family holiday in the Dominican Republic as the race to replace Liz Truss gathered momentum.
SNP preparing for general election as Boris Johnson returns to UK
The former prime minister has flown back to the UK, with many in his party tipping him to return to power after Liz Truss dramatically quit.
Who is backing who in the Tory leadership race?
Candidates need the support of 100 MPs to get on to the ballot on Monday.
Mordaunt throws her hat in the ring in the race for No 10
The Commons Leader has indicated that Jeremy Hunt will stay on as Chancellor if she wins.
Boris Johnson ‘up for it’ and will fly back from Caribbean to run for PM – ally
Sir James Duddridge says the ousted prime minister is preparing to stand to replace Liz Truss.