Balmoral 1

By special permission from the royal household, Antiques Roadshow welcomes visitors to Balmoral, the Queen's private residence in Aberdeenshire, where treasures brought before the experts include a diamond tiara, a giant telescope and a ceramic pot by Pablo Picasso. In the Imposter Challenge, militaria specialist Mark Smith wonders whether Fiona Bruce can spot a forgery amongst a collection of rare medals.