Open Secrets | History Today
This authorised history of the Government Communications Headquarters (GCHQ), otherwise the official version of Signals Intelligence (Sigint) in Britain, has been a while coming. It should have been published in 2019 to coincide with the organisation’s centenary, but required a lot of signing off, not least from its close partners, the US, Canada, Australia and New Zealand, collectively known as ‘Five Eyes’. It was well worth the wait, not just for its unique access to internal papers, but also for its insight into current thinking at Britain’s most respected intelligence agency, a st...