"I don't think David Miliband is leaving because of reasons of politics or ideology or policy. I don't think this is a political divide, I think this it's a personal decision. He's decided, and it seems he's decided in the last few days if he has, that for personal reasons he doesn't want to serve with his brother. I understand that because it must have been incredibly difficult to have lost to your brother in that way ... If as a brother you've decided that it's too difficult I think people would understand that. I don't think it's fair to find some big political split or divide here. I don't think that it really exists."