The 'London deep-level shelters' are eight deep-level
air-raid shelters that were built under
London Underground stations during
World War II. Each consists of a pair of parallel tunnels 16 feet 6 inches (5.03 m) in diameter and 12,000 feet (3.7 km or 2.3 miles) long. Each tunnel was subdivided into two decks and each shelter was designed to hold up to 8,000 people. It was planned that after the war the shelters would be used as part of a new express tube line paralleling the existing
Northern Line.

One of the entrances to the Stockwell shelter, now decorated as a war memorial. ()
Ten shelters were planned, but only eight were completed. These are at:
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Belsize Park tube station
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Camden Town tube station
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Goodge Street tube station
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Chancery Lane tube station
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Stockwell tube station
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Clapham North tube station
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Clapham Common tube station
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Clapham South tube station
The two not completed were at
St. Paul's tube station and
Oval tube station.
The shelters were started in
1940 and completed in
1942. They were originally all used by the government, but, as bombing intensified, five of them were opened to the public in
1944: Stockwell, Clapham North, Camden Town, Belsize Park and Clapham South. The Goodge Street shelter was used by
General Eisenhower and the Chancery Lane shelter was used as a communications centre.
After the war, the Goodge Street shelter continued to be used by the army and the Chancery Lane shelter was converted into
Kingsway telephone exchange.

An upper level of one of the Belsize Park tunnels
Reference
★ Emmerson, A. and Beard, T. (2004) ''London's Secret Tubes'', Capital Transport Publishing, ISBN 1-85414-283-6
See also
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Civil defence centres in London
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Military citadels under London
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Subterranean London
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Blast shelter
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Air raid shelter
External links
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The deep level shelters by Subterranea Britannica