When you are dealing with the world's least trustworthy electorate - the Conservative Parliamentary Party - there are many candidates for this award but I've restricted myself to three awards (and four individuals).
In joint third place are MPs John Maples and Anne Main. Mr Maples actually wrote an endorsement of DD for this site and was responsible for planning Mr Davis' Blackpool programme... but he failed to vote for the Shadow Home Secretary. New MP Anne Main also defected from Camp Davis. She announced her defection on Radio 4 and without even telling Mr Davis.
In second place is John Bercow. At the end of September Mr Bercow said that "Eton, hunting, shooting and lunch at Whites" made David Cameron the wrong man for the job. Mr Bercow was then supporting Ken Clarke. Guess who he supported soon afterwards?
Mr Duncan's advice to Mr Cameron was "go away and leave it to the big boys". At that time Mr Duncan was privately backing Mr Davis. After DC's Blackpool speech Mr Duncan obviously decided that Mr Cameron had grown up and threw his weight behind the new frontrunner.
AD might get his reward in the next 48 hours...