On 05/02/15 22:37, wrote:
This should be interesting.

http://www.theguardian.com/cities/20...ndon-underline

Only the Guardian ...

"Stretches of vacant tunnel remain at Goodge Street and Stockwell, for
example, remnants of a bizarre second world war plan to connect deep
bomb shelters into an express connection running parallel with the
Northern Line."

Ian