London is a city of many layers and we are used to all sorts of activity being underground such as the tube, the Cabinet War Rooms used by Winston Churchill, and the underground railway used by Royal Mail.  The Post Office (London) Railway consisted of around 6½ miles of tunnels and ran from 1927 to 2003.   Once was a busy centre of activity of driver-less trains transporting mail to different depots in London, it is proposed to open it as a unique undergtound ride when the British Postal Museum and Archive re-opens in 2016

Time Out blog editor Sonya Barber had a tour of a section of the railway and has recorded not only the engineering but also the debris, grafitti and rubbish that was left exactly as it was when the final engine stopped and the doors were locked.   Have a look at it here…  Lets hope some of it remains as part of the history when it opens.