The National Archives of the UK is making over 150 top secret MI5 files available online for the first time. This forms part of The National Archives’ First World War 100 programme of digitised releases and events to mark the centenary.
The files contain a wealth of material about organisations and individuals involved in espionage or under surveillance during the period of the First World War. They are part of the wider security service personal file series (file reference KV 2) held by The National Archives.
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