and the Coffeehouse
amongst others have flagged the story of Martin Linton, Labour Member for Battersea, Balham and Wandsworth. In brief Linton, who claims to oppose the third runway at Heathrow voted with the Government for the runway because after 12 years in the House he got confused.
I see 2 readings. Either he is happy to sacrifice his principles and more importantly go against commitments made to his constituents to vote slavishly for the Government; or he is a fool (possibly actually both.) In any event he is unfit to hold office.