Blood and Treasure:

It seems to me that the choice available over this is to outsmart yourself by trying to uncover the “real reasons” behind his resignation or take him at his word and push the issue.

The question that occurs to me is this: Who knew about this first – Nick Clegg or David Cameron? It seems that Clegg’s agreement to not stand a Liberal Democrat in the by-election was required for Davis to go ahead and do it, so did he get the agreement from Clegg first and then present it to Cameron as a fait accompli?