A new behind-the-scenes tour is being launched by London Transport Museum, complementing its popular range of Hidden London experiences.
Many of these have been popularised by UKTV's series ‘Secrets of the London Underground' which has been commissioned for a sixth series.
Visitors will now be able to lift the lid on the secrets behind Holborn Tube station, which is served by London Underground's Piccadilly and Central Lines.
The guided tours will run on Wednesday and Sunday each week from 31 July. Tickets can already be booked on London Transport Museum's website. Tours cost £45 per person and concessions are available.
Experts guides will reveal closed-off areas which are not usually available for public access. Concealed doors lead to expansive disused areas, some of which have not been seen by members of the public in nearly 30 years.
These include the two former platforms which served the Piccadilly Line branch to Aldwych which closed in 1994.
Some of the disused spaces were used to house scientific laboratories while a model railway club was even set up under the streets of London.
Staff working for London Transport during World War II could also shelter here and – drawing on the Museum's extensive archive and collection – visitors will hear how employees may have felt when working under ground at the height of the Blitz.
The tour will also take in an unexpected view of the Piccadilly Line and visitors can view vintage posters which are still in place as well as an original 20th-century signalling cabin. They can also experience the station's original Edwardian design created by Leslie Green.
Other aspects of history will include the major modernisation project of the 1930s which led to the closure of British Museum station, which is located nearby and, coming right up to date, visitors will learn about the key role presently being played by the station as part of a massive signalling upgrade to guarantee the future of the London Underground.
Other Hidden Tours are also available for booking now. Profits generated help fund the charitable activities funded by London Transport Museum.
