Excerpt:
MI5 was investigating four Muslim men who savagely beat a Religious Education teacher, it can be disclosed after they were jailed for at least 19 years.
The Security Service had placed a listening device in a car driven by one of the men as part of an investigation into a suspected terrorist network in East London, sources told the Daily Telegraph.
When transcribers went back over a conversation the men had held in the car, they were picked up discussing killing Gary Smith and praising Allah as they drove from the scene after attacking him.