The Piccadilly line is a route that goes from Uxbridge in west London to Cockfosters in north London. There is also a Heathrow branch that goes via Hounslow and Hatton Cross. The route is 44miles and uses the 1973 stock. Piccadilly line at Acton Town The Piccadilly line doesn't stop at Chiswick Park, Stamford Brook and Ravenscourt Park when it. joins with the District line. Depots: Cockfosters Northfields South Harrow Map Terminus stations: Uxbridge Cockfosters Heathrow loop and terminal 5 Here are some pics Two trains at Cockfosters 1973 stock at Uxbridge 1973 stock at Heathrow Terminal 5