Michael Portillo experiences a terrifying ‘victory roll’ in a World War II Spitfire, high above the most famous aerodrome of the Battle of Britain, Biggin Hill. The 80-year-old aircraft, in which so many young men risked their lives for the nation, is one of a fleet intensively maintained by a dedicated team of technicians, and Michael is privileged to be flown by an ex-Royal Navy pilot. Michael learns of the strategic importance of the sector airfield to the defence of the capital and the country. Back on terra firma, Michael takes the train to East Grinstead on the trail of a bear with very little brain. In Ashdown Forest, he meets a biographer of A.A. Milne to find out about the author’s much-loved character, Winnie the Pooh. Michael plays a game of Pooh Sticks, then treats himself to a ‘little something’ at Pooh Corner.

• Michael Portillo