12:00Nick CofferSonia Purnell & her new autobiography of Clementine Churchill, Letchworth Food & Garden Festival and a group of 'Old Birds'!BBC Three Counties Radio Duration: 3 hours Tue 12th May 2015, 12:00 on BBC Three Counties RadioSonia Purnell, Letchworth Food & Garden Festival and a group of 'Old Birds'!GenresEntertainmentBrandNick Coffer Source: BBC Online