This week we hear from former Foreign Office historian Gill Bennett who had access to the secret archive of MI6, Britain's Secret Intelligence Service. Her book, Desmond Morton Winston Churchill's Man of Mystery, is the most detailed account so far of Winston Churchill's personal assistant and clandestine Intelligence officer Desmond Morton. Gill explains his background and how he lived at Earlylands in Crockham Hill, just a short walk from Winston Churchill's own home, Chartwell, near Westerham in Kent. Gill does not believe that Winston Churchill was a Freemason but evidence suggests otherwise. Morton was also involved after the war in the important role of Britain's representative on the Tripartite commission looking into the whereabouts of Nazi Gold. Jason looks at this week's Private Eye which has doe a joint investigation with BBC Panorama into Tax Havens and tax avoidance and evasion. Ian Cameron was a 'pioneer' of tax avoidance in the 1980s and much of the Cameron family fortune is built on avoiding tax.