Allen Jackson explores signalling along the GCR, formerly part of the LNER.

Allen Jackson's illustrated look at signalling and signal boxes along the routes of the London & South Western Railway.

Allen Jackson takes a lavishly illustrated look at signalling along the South Eastern & Chatham Railway routes.

Allen Jackson explores signalling along the GER, formerly part of the LNER.

For over 150 years Britain's railways have relied on a system of semaphore signalling, but by 2020, all semaphore signals and lineside signal boxes will be gone