The stations form part of Cardiff's commuter rail network, colloquially known as Valley Lines, with Cardiff Queen Street and Cardiff Central being the main hubs of the city. Cardiff Central is also one of the United Kingdom's major railway stations, providing connections to Newport, Bristol, Bath, London, Southampton, Portsmouth, Gloucester, Cheltenham, Birmingham and Nottingham. Cardiff Central continues to serve as a major interchange on the British rail network, with 1,042,297 changes at the station in 08/09. Its passenger usage also increased by around 1.5 million to 11.3 million.[1]