The Antiques Roadshow returns to Castle Howard in North Yorkshire for a classic summer roadshow. The range of objects brought for the experts to peruse is as eclectic as the people who own them, from a humble terracotta figurine to a rare jade Buddha. A collection of dynamic aviation paintings proves a big hit with Paul Atterbury. Although not by a well-known artist, they are a contemporary, eyewitness account of some of the First World War's most vicious dog-fights. Plus a belt buckle used on a nurses uniform proves to be an exotic French creation worth thousands of pounds. Sometimes, it's a collection that makes headlines. At Castle Howard, finds include a collection of highly-decorative snuff boxes and another of Welsh cycling medals, many of which are solid gold. Fiona pits her wits against ceramic specialist Will Farmer to guess which of three items has increased in value over the 40 years that the Antiques Roadshow has been on air. Who will emerge triumphant?