Antiques Roadshow expert, Stephen Lane, discovered a treasured theatrical artefact from a legendary West End production carrying an eye-watering valuation. During an instalment of the popular BBC One programme's companion series, Unseen Treasures at Shuttleworth House in Bedfordshire, expert Stephen was delighted to examine a mask apparently worn by performer Michael Crawford in the production of Phantom of the Opera. A guest presented the famous West End piece, accompanied by a crew jacket and