I think "the LibDems" are the big winners - they fail to capitalise on their surge in support after the debate *at all* and still may get their wish for electoral reform - the jammy gits!
Labour lost in every way you consider loss.
The Conservative Party lost because they couldn't match Blair, or even come close, when the opportunity rarely arises to remove a tired, washed up, third term Government from Downing Street. I wonder if Cameron remembers the triumphal Tony's arrival in Downing Street, greeted as a hero. Had Cameron steered his party to a majority that may well have been him. That must really hurt.