The London Underground Postal Railroad May Reopen

[britwrit]

From Gizmodo:

One of London’s best-kept secrets is that there’s a second Tube system, formally operated by Royal Mail but now left to ruin, lying abandoned underneath the capital. However, it might not remain secret much longer — the Post Office has just submitted plans to get the old lady up and running again.

http://www.gizmodo.co.uk/2013/10/the-ro ... reopening/