We are supposed to be enchanging and completing on Friday.
This morning my solicitor forwards an email from the vendor's solicitor to say that they've just got back from holiday and need to isolate for 14 days .
They want to know are we happy to postpone two weeks?
What do they think? 
Our issues:
Furious with vendor. WTF were they thinking of going on holiday now? (And yes, there is the slimmest of slim chances that wherever they went has been put on the list after they left. Not sure there is anywhere currently not in 'that' list though).
Furious with both solicitors. It seems from the email that they both know they were on holiday.
We have booked removals van and tradespeople, so have our buyers have as well. All is in place, we are in a chain, vendor is not. One of us has taken time off that cannot be rebooked, the other has rejected self-employed contracts to be able to concentrate on decorating, moving stuff, etc. as of Friday.
We wrote to our solicitor to say it was not acceptable for all above reaons. We also asked why can't we proceed as we understand the house we are buying is now empty and no contact in person is necessary.
(Surely the vendor hasn't gone back to the house from holiday two days before having to vacate it, have they??)
Helpfully, radio silence from our useless solicitor since this morning.
What can we do? Has anybody moved recently and done all the legal stuff remotely? Did you have to physically see anyone on the day?