One of the four men who returned to Britain yesterday after three years in Guantánamo Bay allegedly suffered a series of mental breakdowns and was repeatedly injected with an unknown substance by his US captors.

A lawyer for Feroz Abbasi made the allegations as he and three other Muslim men arrived in Britain aboard an RAF plane, only to be arrested by anti-terrorism officers who took them to a top security police station for questioning. Mr Abbasi is alleged to have been kept in isolation for 18 months and was left so traumatised that he suffered hallucinations and panic attacks.

And, get this: These are only the allegations the U.S. military is allowing the man's lawyer to air:

Ms Gutierrez, whose comments are subject to US military censorship, told the Guardian her client was showing clear signs of the debilitating post-traumatic stress disorder and suffering from panic attacks. She said: "The time in isolation led to mental breakdowns, he was talking to himself, hallucinating, sitting in the corner.

The Guardian also has a very interesting question and answer article about treatment of the British detainee.,