My personal choice would have been David Davis, but he's not having a go. I hope he might be part of the team to negotiate the withdrawal.
I don't think Gove has a chance of winning. I think this move is a stop Boris and help make sure May gets it move.
Boris is popular among the members and would have been favourite against May, but not cut and dry because he does lack ministerial experience.
Gove against May will be a walkover for May as I cannot see the members voting for Gove in large numbers following his pre-referendum statements.
May has said she will appoint a Brexiteer to head up the negotiations and I thnk she was alwasy 50/50, a bit like Boris, but decided too come down on the side of the Govt without actually campaigning.
Watch out for Andrea Leadsome. She has a good CV in business, later to Parliament, but came across well in the TV debates.
I think it could be an all female run-off.
I'm not sure why Crabb and Fox have stood. Ego perhaps? Can't see them lasting long.
I don't buy in to the crisis / mess debate. We've had examples in the past of a PM stepping down mid-term and a pause while a new one is elected.
The Civil service run the country, the cabinet is still in place as is the PM in this instance. Every Summer Govt is faced with this situation anyway as the Commons goes in to summer recess.