On Oct 14, 9:20 am, Mwmbwls wrote:
http://underground-history.co.uk/claphamn.php

Would this route be of any value to us now if it were turned into a
tube line?

Yes, undoubtedly. Stockwell to Clapham Common is the busiest part of
the Northern line and is unlikely to get any relief from any other
projects (Crossrail, ELLX etc) so a parallel express line would be
useful. Unfortunately the fact that a few bits of tunnel are already
there doesn't stop it being absolutely unaffordable.