The expenses scandal tarnished those at the very heart of British democracy. Some politicians in the so-called Mother of Parliaments were shown to be greedy and a few criminal.

A handful went to jail and one of those is the former Conservative peer and former leader of Essex County Council Lord Hanningfield.

So why did he do it? Is there something fundamentally wrong with Britain's political culture and with those who go into politics? And what lessons can a lawmaker learn from prison?

(Image: Lord Hanningfield)