Countryfile: South Gloucestershire

Countryfile is deep in Gloucestershire exploring some woodland treasures. Julia Bradbury is at the National Arboretum in Westonbirt, finding out why workers at this haven for more than 16,000 trees are about to cut down one of its oldest residents. At a secret woodland location across the border in Wiltshire, John Craven is on the trail of home-grown black gold; English truffles are thriving, thanks to our rainy summer. They are even giving their continental cousins a run for their money, and John has found a four-legged, furry friend to help him sniff out these expensive delicacies.