You can tell this is now a serious fight for Gordon Brown by the fact he has joined the open-necked shirt brigade. At the weekend, he was on screen in a blinding white shirt, open by a sedate one button at the neck. Is Gordon worried that he looks too buttoned-up beside Nick and Dave? You bet. Alas, there are some men who, when they go for the chest-revealing look, simply look like they forgot to wear a tie.