Elstree South tube station

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Elstree South was a planned London Underground station in Elstree, Hertfordshire, designed by Charles Holden. It was part of a proposed extension of the Northern line from Edgware to Bushey Heath, and would have been the second of three stations in the Northern Heights project. The aim was to electrify and integrate some steam lines, boost housing development, and provide a large depot for new 1938 Stock trains. The station would have been in a cutting with two very long tunnels nearby toward Brockley Hill, and depot sidings would sit to the south. The station building was to feature a Roman Centurion statue, inspired by the nearby Roman site of Sulloniacae. The location was close to the A5183, north of the A41 junction, on land bought from the unbuilt Watford and Edgware Railway.

Elstree Hill (now Elstree Hill South) would have been widened to about 100 feet to accommodate a planned trunk road improvement scheme for the A5 (now part of the A5183). Construction began in the late 1930s, but World War II halted progress. Some work, including earthworks and tunneling between Edgware and Elstree South, had started by 1939, but the project was suspended and then canceled in 1950 due to wartime funding limits and later Green Belt legislation that restricted new housing. After the war, the tunnels were sealed in 1949, and their entrances were buried in the 1960s when the M1 motorway was built; today nothing visible remains above ground.