But then, during the proceedings, a senior MI5 officer - a deputy director of the organisation and senior counter-terrorism officer, known in court as Witness A - mentioned some phone calls ...

The corporation has also said MI5 changed its position once the BBC provided evidence, including a recording of a phone call in which X’s status was confirmed to the reporter. Following the ...

The head of MI5 has said he is concerned over new lines of communication between terrorists, particularly internet phone calls. In an interview with The Daily Telegraph yesterday, spy chief ...

But it said a senior MI5 officer had subsequently breached that policy by saying they had been legally authorised to say X was an agent and by confirming the man’s status in a recorded phone ...