The guidelines revealed by the investigation showed that MI5 – which handles the UK's domestic security – had free reign to spy on highly private and sensitive lawyer-client conversations between April 2011 and January 2014.
MI6, which handles foreign intelligence, had no rules on the matter either until 2011, and even those were considered void if "extremists" were involved. Britain's answer to the NSA, GCHQ, had rules against such spying, but they too were relaxed in 2011.
"By allowing the intelligence agencies free rein to spy on communications between lawyers and their clients, the Government has endangered the fundamental British right to a fair trial," said Cori Crider, a director at the non-profit Reprieve and one of the lawyers for the Libyan families.
"For too long, the security services have been allowed to snoop on those bringing cases against them when they speak to their lawyers. In doing so, they have violated a right that is centuries old in British common law. Today they have finally admitted they have been acting unlawfully for years."