The Signalling Record Society
ELR to RailRef Correlation - ELR Codes V
This page should be regarded as “Work in Progress”. The
The first installetion of the Sykes Lock & Block system was at Cambria Junction on the London, Chatham & Dover Railway in May 1876.
Signal Fact 73
The Lock & Block system was used by that railway and also by the London, Brighton & South Coast Railway, the South Eastern Railway and the Great Eastern Railway.
Away from the London area, the system was used by the Hull & Barnsley Railway.