Great Western Railway (GWR) is a British train operating company owned by FirstGroup. It provides the majority of commuter and outer-suburban services from its Central London terminus at London Paddington to West London and the Thames Valley region including Berkshire, parts of Buckinghamshire and Oxfordshire along with long-distance inter-city services via the Great Western Main Line to South West England and South Wales. It also provides regional services throughout the South West of England and to the south coast of England, and the Night Riviera sleeper service.