As a tactic, it did not entirely work: Friday’s Daily Telegraph front page headline was “Killer escaped from MI5’s radar”. She disclosed that the attacker Khalid Masood was once investigated by MI5 in relation to concerns about violent extremism but that he was “a peripheral figure” and that the case had been historic. MI5 and the UK’s two other intelligence agencies – the surveillance body GCHQ and MI6, responsible for overseas spying – faced legitimate questions after the London bombings. In the case of Rigby, one of the two attackers involved had been monitored by MI5. He came to the attention of MI5 a number of years ago over a mystery single incident that it concluded did not justify monitoring.

Source: The Guardian March 24, 2017 19:19 UTC