Roger Waters has attacked the 'institutionalised' brutality of Guantanamo Bay in an open editorial for The Daily Mail.
The former Pink Floyd bassist questioned Britain's role in the CIA's alleged programme of torture at the Cuban camp, namechecking British prisoner Shaker Aamer in particular.
Aamer, 46 and from London, was arrested by the US before being taken to Guantanamo after working in Afghanistan 13 years ago.
"During Mr Aamer's long spell of incarceration, he has never been put on trial or even had any charges leveled against him," Waters wrote in the Mail. "No human being should be subjected to such monstrous and prolonged treatment — 13 years, with no evidence produced to suggest a crime!"
Waters went on to say how he became involved after learning of the impact of the Pink Floyd track 'Hey You' upon Aamer while he was incarcerated.
"Mr Aamer said the lyrics captured his experience in Guantanamo," wrote Waters. "I was profoundly touched that 'Hey You' had had such a resonance with him."
He added: "This abuse of power exhibits all the hallmarks of despotism. Either we believe in freedom to live under the law, including the law of Habeas Corpus, or we don’t."
Read his full open-ed here.
Earlier this year, Pink Floyd released No.1 album, The Endless River - recorded and released without Waters. Watch our interview with Nick Mason talking about the record and their potential plans for touring here.