Celebration Foods: Truffles, Sparkling Wine and Champagne

Ahead of the biggest party night of the year we meet producers of celebration food and drink from the British countryside. Sarah Swadling goes truffle hunting at a secret location in Wiltshire. She visits a smokery in Gloucestershire which continues the tradition of curing wild salmon from the River Severn. Charlotte Smith, meanwhile, is at one of the biggest makers of English Sparkling Wine, in Kent. Produced and presented by Sarah Swadling.