I'm a very positive person, but this whole concept of having to always be nice, always smiling, always happy, that's not real. It was like I was wearing a mask. I was becoming this perfectly chiselled sculpture, and that was bad. That took a long time to understand.

All political careers end in failure, but few did it so quickly as David Cameron's. He came to power promising not to 'bang on about Europe' and ended up having the continent's name chiselled into the lid of his political coffin.