Hi all,

The picture in page 2 of
http://www.murphygroup.co.uk/pdf/Tunnelling/Elstree.pdf seems to show that
there is (or was) a single track railway in the new National Grid tunnel
from Elstree to St Johns Wood, underneath the A5. Despite having almost half
the cross-sectional area of a Jubilee Line Extension tunnel, the whole 20
kilometres of it seems to have been built for the cost of 200 metres of
double-track JLE! (An unfair comparison for several reasons...)

--
John Rowland - Spamtrapped
Transport Plans for the London Area, updated 2001
http://www.geocities.com/Athens/Acro...69/tpftla.html
A man's vehicle is a symbol of his manhood.
That's why my vehicle's the Piccadilly Line -
It's the size of a county and it comes every two and a half minutes