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GCHQ (Government Communication Headquarters) is the successor to the famous Bletchley Park wartime code-breaking organisation and is the largest and most secretive intelligence organisation in the country. Richard Aldrich traces GCHQ's evolvement from a wartime code-breaking ope…
GCHQ (Government Communication Headquarters) is the successor to the famous Bletchley Park wartime code-breaking organisation and is the largest and most secretive intelligence organisation in the country. Richard Aldrich traces GCHQ's evolvement from a wartime code-breaking ope…