Christina Helen Johanne Trevanion (born 12 June 1981) is a British auctioneer and television personality. She is a partner in the firm of Trevanion & Dean, auctioneers and valuers, based in Whitchurch, Shropshire. Trevanion founded the firm with Aaron Dean, having previously worked at Christie's. She has appeared on a number of BBC daytime television programmes as an expert in antiques and as an auctioneer, including Bargain Hunt, Antiques Road Trip, Put Your Money Where Your Mouth Is and Flog It!.