By Duncan Gardham
It comes after it emerged that at least 10 Britons have been tortured by security services in foreign countries acting in collusion with MI5, according to a report by a civil liberties group.
Human Rights Watch (HRW) claims the UK citizens were tortured in Pakistan and subsequently questioned by British intelligence officials.
It said evidence collated from Pakistan intelligence officials indicated a "systemic" operation among British security services, involving a significant number of agents.
HRW warned more cases may surface and the issue of terrorism suspects interrogated by British agents is likely to "run much deeper".
The report will embarrass David Miliband, the Foreign Secretary who has been criticised for refusing to disclose documents relating to the treatment of Mohamed, who is due to be examined by doctors in the UK upon his release.
A medical report on Mohamed, who had been on hunger strike, says he is suffering from malnutrition, stomach complaints, sores on his hands and feet, bruising, damage to his ligaments, and organ damage, along with profound emotional and psychological problems.