Simon Lowe takes a detailed look the signal box diagrams exhibited above lever frames in signal boxes and traces their development and styles from the start of nationalisation in 1948 through to the end of the British Railways era in 1994.

The Scottish Region was a combination of the Scottish areas of the LMSR and LNER and thus needed to stamp its own fresh style across the entire region.

This new book explores new ground and illustrates and details how the signal box diagrams that were such an important feature of signal boxes in Scotland were designed and produced