We’ve included downloadable historical information sheets and other resources to help you with your research.
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Post Office Telecommunications in the First World War
By November 1918, Great Britain had the world's most advanced air defence scheme. Relying heavily on the communications network this was just one of many important Post Office contributions
pdf - 277 KB
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The Slingo Report
A 1919 report of the GPO Engineer in Chief, Sir William Slingo, detailing all the work that BT and Openreach predecessor the GPO Engineering Department carried out for the war effort
pdf - 14.63 MB
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GPO Engineering Department roll of honour WWI, 1915-1920
Published in weekly Post Office Circulars.
pdf - 11.58 MB
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Post Office Roll of Honour of all GPO fallen WWI, 1914-1920
Published in weekly Post Office Circulars.
pdf - 71.27 MB
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GPO Engineering Department Roll of Honour WWII, 1940-1947
Published in the Journal of the Post Office Institution of Post Office Electrical Engineers.
pdf - 10.42 MB
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Souvenir of the Ceremonial at the dedication of the Central Telegraph Office War Memorial, 1921
The Central Telegraph Office was located on the site now occupied by BT Centre.
pdf - 4.92 MB