The railway system in Great Britain is the oldest railway system in the world. The first locomotive-hauled public railway opened in 1825, which was followed by an era of rapid expansion. Most of the track is managed by Network Rail, which in 2017 had a network of of standard-gauge lines, of which were electrified. These lines range from single to quadruple track or more. In addition, some cities have separate metro, light rail and tram systems (including the extensive and historic London Underground). There are also many private railways (some of them narrow-gauge), which are primarily short lines for tourists. The main rail network is connected with that of continental Europe by the Channel Tunnel and High Speed 1 (originally the Channel Tunnel Rail Link), which fully opened in 1994 and 2007 respectively.
In 2019, there were 1.738 billion journeys on the National Rail network, making the British network the fifth most used in