Most Popular tube in London List of busiest London Underground stations The London Underground is a rapid transit system in the United Kingdom that serves London and the neighbouring counties of Essex, Hertfordshire and Buckinghamshire. Its first section opened in 1863.[1] The system has 270 stations.[1] In 2019, King’s Cross St. Pancras was the busiest station on the network, used by over 88.27 million passengers, while Kensington (Olympia) was the … Continue reading Most popular tube line in london