Photos of the BR Class 332 operated by Heathrow Express between Heathrow Airport and London Paddington. The Class 332 was built in 1997 – 1998 by Spanish CAF and German Siemens. A total of 14 trainsets was delivered in 1998 and consists of 9x four car sets and 5x five car sets. The Heathrow Express is electrified (as the first on the Great Western Main Line) and is powered by a 25kV AC overhead power line. The maximum speed is 100 mph (161 km/h).