Antiques Roadshow: Abbey Pumping Station

Tonight Fiona and the team make a return visit to the historic Abbey Pumping Station in Leicester, now the city's Museum of Technology. Complete with four working beam engines, it's a fine example of Victorian engineering. Expert Ronnie Archer-Morgan swoons over some 1960s steel sculptures, books specialist Rupert Powell meets playwright Joe Orton's sister, who brings in the typewriter on which he wrote some of his most important scripts, and Amin Jaffer discovers a valuable collection of exotic metal boxes - they look like snuff boxes, but their actual purpose is much more intriguing.