It’s the halfway point of our treasure trip. Experts Catherine Southon and Tim Medhurst hit the shops between St Albans and Bushey, with Tim bagging himself a piece of American folk art and Catherine plumping for some items that would serve very well at elevenses. But will their plans pay off at the Hertfordshire auction?

Along the way, Tim sends up a drone to check on the ultimate field trial, and Catherine finds out about a man who was pulling out all the stops in the nineteenth century – but can she play to his tune? Show less