Nick Robinson goes behind the closed doors of Westminster and Whitehall to ask how controversial decisions are reached.

In the first of a new series, Nick discusses whether it is time for the government to get tough with tax avoidance. He is joined by Caroline Lucas MP, the Green Party leader who has a private member's bill on tax avoidance, the former Trade Minister Lord Digby Jones, Sir Nicholas Montague, the last head of the Inland Revenue, by Michael Jacobs, a former special adviser in both the Treasury and Number 10, and by Fraser Nelson, the Editor of the Spectator. Show less