London's Secret Life: Q-Whitehall
It is not surprising to hear of London’s Secret Underground city, with over 2,000 years of history having been burnt down many times (first recorded in AD61 when Queen Boadicea burnt the Roman Sympathetic Settlement down), rebuilt, redeveloped, restructured for defenses and then bombed again in WWII.
It is known that there is a secret entrance to 10 Downing Street, from a cabinet office at 70 Whitehall. This runs along the indoor Cockpit passage built by King Henry VIII to get to his indoor tennis courts in his grand, but split, Palace of Whitehall, without being disturbed by the public. This secret tunnel, like many others in the area are still being used today within Whitehall, maintaining that necessary power of secrecy and knowledge the government seeks over the media.
Victorian London’s engineers purpose built tunnels for the utilities we still need to maintain today, like water, gas and electricity to cause minimum disruption to life above. Unused tram, tube and railway lines leave tunnels between stations, the Post Office Tunnels were created independent of the underground (with smaller tunnels and trains) but the Royal Mail declared it closed in 2003 and rumours of these unused tunnels spark conspiracy quite naturally.
There are many myths circulating about London’s Underground Citadel, secret tunnels and passageways. some of which I am unsure, (such as the Buckingham Palace secret Tube Line) and others I know for fact to be true. Q-Whitehall has some truths and what may have been designed for escape purposes is now used for easy access to government buildings every day by members of Westminster as well as civil servants and their staff. What remains is locked in the National Archives under the Official Secrecy Act.
moar: https://lifeinlondon-londonlife.blogspot.com/2010/02/londonsecretlife-q-whitehall.html