Mr Sunak has confirmed he will resign as Tory leader once arrangements are in place to choose his successor.
There have been murmurings for the last few weeks about whether an interim leader is appointed to avoid the awkwardness of, for example, the former PM having to do Prime Minister’s Questions from the opposition benches.
Could this be someone who served in the cabinet previously – like Sir Oliver Dowden, James Cleverly, or even Jeremy Hunt, who just about scraped back into the Commons?
If so, it would probably need to be someone who doesn’t actually want to run for leader full time.
Otherwise, Mr Sunak could stay on until the next Tory leadership contest concludes.
There are some MPs who have been working behind the scenes for a long time on shoring up their support, including Kemi Badenoch (the bookies’ favourite) who is on the right of the party, and Tom Tugendhat, who is more to the centre.
Former contenders like Suella Braverman and former Sunak ally-turned-critic Robert Jenrick are tipped to run too.
They both spent time in the Home Office, are on the right of the party, and have criticised the government’s record on immigration.
One interesting thing to note, though, is who the remaining Tory MPs are, and what that might mean for who wins support among the parliamentary party.
I’ve had a quick skim over the new intake of Tory MPs and who they backed in the first Tory leadership contest of July-September 2022.
Interestingly, the majority are Sunak-backers, with a hefty chunk of Liz Truss supporters too.
Suella Braverman and Kemi Badenoch have lost a couple of their key allies on the right of the parliamentary party. A couple of Mr Tugendhat’s backers are gone too.
