The Signalling Record Society
ELR to RailRef Correlation - ELR Codes V
This page should be regarded as “Work in Progress”. The
The first structures which became known as signal boxes were opened by the South Eastern Railway on the approaches to London Bridge in the very early 1860s.Signal Fact 29
Built by Saxby & Farmer on legs and spanning the tracks, they featured semaphore signals on posts elevated above the signal box structure.