"I don't know who is to blame," Mr Easterbrook says. "The issue of obesity is complex and is absolutely one our society is facing, there's no denial about that, but if you break it down I think there's an education piece: how can we better communicate to individuals the importance of a balanced diet and taking care of themselves? Then there's a lifestyle element: there's fewer green spaces and kids are sat home playing computer games on the TV when in the past they'd have been burning off energy outside.