Lymm Signal Box: interior

Lymm signal box looking eastwards showing the entrance in the centre and the manually operated signal levers on the right.  The equipment above them was a simple  Morse-code like communication system used to communicate with the next signal box in each direction to ensure that all boxes in that zone were aware of a train in their line control.  A train coming from the east would initially be announced by a series of bell rings.  The signalman had to acknowledge the rings by tapping on a rocker switch.  A similar technique would be used to warn the next signal box that the train had passed.

Text by Peter Thomas