SignalBox.org
Title
Home Signal
Description
A "Who's Who?" of railway signalling
Here is a list of all British railway companies that are known to have installed mechanical signalling on their lines, together with a guide to the contractor's designs of box and frame used.
Dates of absorption by other companies are shown in the right-hand column, together with hyper-links to the entry on this page for that company.
It is emphasised that the reference to designs does not necessarily indicate that the boxes and frames were actually built by the contractor themselves - in some cases they were built to the contractor's design by the railway company, or even by another contractor if specified by the company.