Clare Balding walks in Suffolk with the writer Geoff Nicholson. They talk of the history of walking, of flaneurs, pedestrianism and psychogeography. Geoff has delighted in walking all his life; from the daily walk to school,to trips with his father to the Peak District to the rambles he now takes around his new home of Los Angeles. He explains to Clare that his favourite walk is always his next one. Producer: Lucy Lunt.