They need to get behind Clarke, or tie Harman to a chair, gag her and then let her be caretaker for a few days. JC is too device.
I don't think they can get behind anyone to be PM at the moment.
A national unity government needs 2 months to organise a GE and handover to a new PM.
Meanwhile, parliament's top objective at the moment remains unchanged, to deliver brexit.
Putting a remainer in No 10 will make Farage's day.
I think parliament is desperate to link acceptance of any deal to a confirmatory referendum as soon as possible but there is just no time for it.
If they don't go for a VONC now, Dominic Cummings may win in the chaos, letting Bojo free to get over the line with no deal.
If they go for a VONC now, they will have to have GE first, and if the brexiters win a majority in that GE, they'll cancel a second referendum.
The rebels' best move is still to extend A50 as soon as possible.