As ever with Dirty Pretty Things, today is very much the morning after the night before. No matter that it is 2pm in the car park of the Reading Festival: front man Carl Barat is horizontal and unconscious somewhere in the festering womb of his tour bus, and he is not coming out. Drummer Gary Powell and guitarist Anthony Rossomando have surfaced and staggered off in need of calories, while bassist Didz Hammond has made it into the bus's chaotic lounge area, where he lights up a cigarette and sucks on it as if it possessed the very essence of life itself. Yesterday, DPT played in Paris, the day before Belgium. Belgium, he recalls, was "a stinker". "We were bad because we were …