Armed with his early 20th century Bradshaw's Guide, Michael Portillo continues his journey from Warrington to the Potteries in Stoke on Trent. In Manchester at the magnificent Heaton Park, Michael discovers one of the first open-air concerts was held here in 1909 by an opera fan, William Grimshaw, who entertained 40,000 people to the music of opera superstar Enrico Caruso on a gramophone.