Antiques Roadshow: The Royal William Yard 1

Fiona Bruce presents from the Royal William Yard in Plymouth. Finds include a pair of doorknobs said to have belonged to Lord Nelson, though militaria specialist Graham Lay has doubts about them, and a psychedelic painting of a band that played at Woodstock. Jewellery specialist John Benjamin marvels at a huge diamond necklace the length of skipping rope, while the team are also impressed by a chess set made from parts of the aircraft carrier HMS Ark Royal, a winged armchair that has travelled from Vermont, USA, and a rare Japanese bronze vase that had been languishing in a Yorkshire garden.