See the article: The Guardian view on GCHQ: snooping beyond the law: Editorial: Intelligence swapping with the Americans had been breaking the law for years. Without Edward Snowden, it still would be (link) And see:
See the article: The Guardian view on GCHQ: snooping beyond the law: Editorial: Intelligence swapping with the Americans had been breaking the law for years. Without Edward Snowden, it still would be (link)
And see: GCHQ: 7+ years of spying on lawyers/clients heralds mistrials claims (undercoverinfo, link)
Also: GCHQ: IPT Ruling on Interception (link)