RISC OS S.V.R. S&T Department RISC OS
http://www.svrsig.org/
This site describes signalling on the Severn Valley Railway and the activities of the volunteer S&T Department. Mechanical locking and some of the principles of Signal Engineering are explained. Some computer software may be downloaded. It is arranged in six sections.
Map of G.W. Signalboxes
Search for any G.W. signal box to locate
it on a map (or satellite picture).
Show the slot reference and technical
data (where available) for any box.
 
Animated mechanical locking
B.R. (W.R.) S&T drawing numbers
explained. Selected boxes listed with
locking charts, locking tables and
box diagram to download.
Some animated mechanical locking. 
Signal Engineering
Three slide shows: a brief introduction to the
signalling principles, a trip up the line with
the S&T on a works train and a look at the
whole line from an S&T perspective.
Links to other web sites
Links to other sites of signalling and
associated interest.
 
 
Description of S.V.R. signalling
This describes the signalling at each
location on the S.V.R. including pictures in
or around each signal box and the signal
box diagram.
The site was last updated on 23rd May 2014. Worth a look is 1940s railway maps. These maps show many boxes - recently added Midland boxes. A text search for a box name is included, as well as links to a modern map and a satellite image.
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