Previously confidential documents published today reveal the staggering extent of UK Government surveillance that has been kept secret from the public and Parliament for the last 15 years. Revealed in a case brought by Privacy International about the use of so-called 'Bulk Personal Datasets' and a law dating back to 1984, the extracts show that the UK Government's intelligence services, GCHQ, MI5, and MI6, routinely requisition personal data from potentially thousands of public and…