Traditional Signalling on British Railways PG25 and highlights the power of

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Traditional Signalling on British Railways PG25 and highlights the power ofSignalling on British Railways underwent massive change from Nationalisation in 1948 to privatisation in the 1990s, but throughout this period much of the networks infrastructure dated from the era of the Big Four and the pre Grouping companies. The variety of traditional signalling in use in the BR era, from the pre Grouping infrastructure and mechanical signalling up to BR built signal boxes prior to the conversion to colour light signalling, is