On Fri, 06 Feb 2015 09:23:17 +0000, The Real Doctor wrote:

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

Are the disused Mail Rail tunnels suitable for this, or are they too small?