The Antiques Roadshow visits Trentham Gardens near Stoke-on-Trent, where treasures include rare items from the region's historic potteries, a brooch that belonged to flying ace Amy Johnson and a portable road map described as an early form of satnav. Jewellery specialist Susan Rumfitt challenges Fiona to spot the odd one out among a collection of gold necklaces and bracelets - one of which is actually made from a cheap imitation alloy known as pinchbeck.