As Liz Truss leaves No 10, who's next through the revolving door?

Liz Truss' decision to step down as PM came 105 days after Boris Johnson trod a similar path.

But now the unthinkable is being talked about - a return of Boris to No 10.

He will need the support of at least 100 Tory MPs if he is to make a spectacular comeback to replace Truss who quit just 44 days after getting her feet under the table.

Her resignation, signalling the end of the shortest term by any prime minister, followed a botched financial statement, the loss of two of her most senior Cabinet ministers and an open revolt by Tory MPs.

The Conservatives are now scrambling to elect a replacement by the end of next week.

Allies of Johnson pushed for him to make a return, less than two months after leaving office, while Rishi Sunak, who defeated Ms Truss among MPs in the last contest, is widely expected to stand.

In a bid to avoid another lengthy leadership contest – and potentially eliminate the need for a vote among members – candidates will need the support of 100 of the 357 Tory MPs in Parliament to make it onto the ballot paper.