London Transport Museum have just released tickets for its award-winning underground tour for spring and summer. 

The Hidden London Tours go below ground to dredge up secret and forgotten location within the Underground network - and there are some pretty incredible things to discover. 

London's transport system has weathered war, many chapters in time and its own evolution, and still bears markers to prove it. 

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The Resident: Discover an underground bunker built for 8,000 people on a trip to Clapham SouthDiscover an underground bunker built for 8,000 people on a trip to Clapham South (Image: London Transport Museum)

Nine in-person tours will take guests through a labyrinth of historic underground passageways. 

This includes a tour around Aldwych station which, while closed as a station for nearly 100 years, provided shelter to Londoners during the Blitz and has been used as a film and television location. The station still has its original 1907 ticket hall and lift as well as abandoned platforms and inter-connecting walkways. 

A tour below Clapham South reveals how the station was built to house more than 8,000 people in war time and came with canteens, medical stations and sleeping quarters. Caribbean migrants also called it home temporarily after making their way to the UK on the HMT Empire Windrush. 

The Resident: Euston station still contains remnants of old advertising postersEuston station still contains remnants of old advertising posters (Image: London Transport Museum)

A trip around Moorgate will take you back to the station's early days. Discover Moorgate's original glass tiles, abandoned tracks and even a 1904 complete Greathead shield still in situ. 

The labyrinth of tunnels underneath Euston which were once open to the public as a thoroughfare, still has preserved advertising poster fragments that go back 50 years or so. On this tour, you can also see station designed by prominent turn of the century architect Leslie Green. 

Other tours take place in Westminster, Shepherd's Bush and Piccadilly Circus. 

The Resident: Nine Hidden London Tours will take you beneath the capital to explore its pastNine Hidden London Tours will take you beneath the capital to explore its past (Image: London Transport Museum)

In addition to the in-person underground tours, the museum has walking tours around Covent Garden, Kingsway, Lincoln's Inn Fields and Victoria Embankment. 

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Eight virtual tours will take you around stations including Holborn, York Road, Aldwych and Elizabeth line stations  Tottenham Court Road and Liverpool Street Station. 

Tickets for the Hidden London Tours start from £44/£39 adult/concession. 

Address: Covent Garden Piazza, WC2E 7BB