Some say he's hanging on due to a delayed wedding party booked at Chequers, which presumably he wouldn't be able to use pro bono if not incumbent. 

 

When it's not a resignation...?

Is this a trick question? If one ignores the headlines, effectively all he's done is handed in his notice, no?

A resignation is when one ends their employment, not the beginning of that process.

Buying time.

Wow. I wasn't expecting this: an even dumber and more dysfunctional government without Boris. WTAF?

I think it was probably expected. Essentially, Truss is the mad cat-woman who screams that she'd do a better job of being PM, and, stewarded by the right-wing of the (already right-wing) European Research Group, the Tory Party has said, 'Go on then.' What a lot of people don't understand is that the important vote is the Tory Party members. This tiny group is what floats to the top in an unsavoury sewage lake. Many are not even UK citizens, but "conservatives abroad", which is to say people who, although they cannot vote in a UK general election, CAN vote in a contest for the UK Prime Minister. We are that bizarre nation where Russian oligarchs can join Italian and Hungarian fascists, US libertarians and alt-righters, and legally vote for the head of the government.