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 2024 had a network of 9,848 miles (15,849 km) of standard-gauge lines, of which 3,810 miles (6,130 km) were electrified. In addition, some cities have separate metro, light rail and tram systems, among them the historic London Underground and the Glasgow Subway. 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, opened in 1994 and 2007 respectively.
In 2024, there were 1.612 billion journeys on the National Rail network, making the British network the fifth most used in the world (Great Britain ranks 23rd in world population). Unlike a number of other countries, rail travel in the United Kingdom has enjoyed a renaissance in recent years, with passenger numbers approaching their highest ever level (see usage figures below). This has coincided with the privatisation of British Rail, but the cause of this increase is unclear. The growth is partly attributed to a shift away from private motoring due to growing road congestion and increasing petrol prices, but also to the overall increase in travel due to affluence. Passenger journeys in Britain grew by 88% over the period 1997–98 to 2014 as compared to 62% in Germany, 41% in France and 16% in Spain.
