In article , Paul Corfield
writes
At Walthamstow the tunnels run for a considerable distance - I
understand that they almost reach to Wood Street station but I don't
know how close to the surface they reach or whether the remain at the
same depth as at Walthamstow Central. I don't know how far they go
beyond Brixton station.

Using the standard "km from Ongar" scale:

Walthamstow station 27.33
Walthamstow tunnel end 26.98

Brixton station 48.61
Brixton tunnel end 49.02

The station locations will be the midpoint of the platforms, so assuming
a station length of 140m, that gives tunnel lengths of 280m and 360m.

--
Clive D.W. Feather | Home:
Tel: +44 20 8495 6138 (work) | Web: http://www.davros.org
Fax: +44 870 051 9937 | Work:
Please reply to the Reply-To address, which is: