The secret role played by MI6 was revealed after the fall of Gaddafi, when documents were found in ransacked offices of his intelligence chief, Moussa Koussa.

One, dated 18 March 2004 was a note from Sir Mark Allen, then head of counter-terrorism at MI6, to Moussa Koussa. It said: “I congratulate you on the safe arrival of Abu Abd Allah Sadiq [Abdul-Hakim Belhaj]. This was the least we could do for you and for Libya to demonstrate the remarkable relationship we have built over the years. I am so glad. I was grateful to you for helping the officer we sent out last week.”

Allen added: “[Belhaj’s] information on the situation in this country is of urgent importance to us. Amusingly, we got a request from the Americans to channel requests for information from [Belhaj] through the Americans. I have no intention of doing any such thing. The intelligence on [Belhaj] was British. I know I did not pay for the air cargo [Belhaj]. But I feel I have the right to deal with you direct on this and am very grateful for the help you are giving us.”