"Not just UKIP, the next Labour Leader is not obvious (probably Cooper). The choice on offer for Labour is a very poor bunch. At least if Cameron had gone, there would have been a queue for his job. "
The reason it isn't obvious by contrast with UKIP is precisely because there ARE a lot of strong options.
It won't be Yvette Cooper I'll tell you that now, though. Liz Kendall might be a better bet as the first female leader, but there's no rush.