David Cameron was having fun during his interview with Adam Boulton:
Its a rather strange poster. If Labour can't afford to put it up maybe we'll help them and put them up.
Cameron should remember that in 33 days he could become our Prime Minister. It is about time be started behaving like one and stopped telling cheap jokes.
At least he was wearing a shirt and tie, which is point 11 of Franks Luntz’s election winning handbook.