This book traces the evolution of signalling in the British Isles from the 18th century to the 1960s, focusing on the development and technical aspects of railway signalling. It covers the transition from mechanical semaphore signals to modern systems, including the introduction of rules and electric telegraphs. The book also highlights the history of the traditional signalling methods and their impact on railway operation. A valuable resource for enthusiasts and those interested in railway history. BOOK-14-V30
