The last ‘Briton’ in Guantanamo Bay has given the first detailed account of how he was tortured in the presence of British agents.

Shaker Aamer says his head was repeatedly slammed against a wall while a British officer was in the room.

On another occasion, a young British officer in a red beret visited him in a ‘cage’. Both alleged incidents took place on US bases in Afghanistan shortly after his 2001 capture.

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Prisoner: Shaker Aamer is pictured right and left with his son Michael and daughter Johninh. He has not seen his family for 14 years

Mr Aamer’s account is one of the most serious allegations levelled at the security services for ‘complicity’ in the CIA’s notorious torture programme.

Lawyers for Mr Aamer – who has been held at Guantanamo Bay for 13 years without charge or trial – say the 48-year-old British resident is being denied freedom to keep a lid on his claims.

But he was allowed to tell his story to a doctor who examined him last year and she has quoted him extensively in her medical report.

Californian independent psychiatrist Dr Emily Keram describes how Mr Aamer was beaten, shackled in painful ‘stress’ positions, deprived of sleep, given frostbite and mentally ‘destroyed’ by interrogators who tormented him by saying they would rape his five-year-old daughter as she screamed: ‘Daddy! Daddy!’

Mr Aamer’s medical report was commissioned by his lawyers and lodged with a federal court in Washington in April last year as part of a motion calling for his release due to his ill health.

Mr Aamer has been cleared twice for release from Guantanamo but has yet to be allowed back to South London where his 40-year-old wife and four children live.

Mr Aamer has been cleared twice for release from Guantanamo but has yet to be allowed back to South London where his 40-year-old wife and four children live. Inmates are pictured at the notorious US camp

Born in Saudi Arabia, he moved to London in 1996 and worked as an Arabic translator. Granted UK residency, he married a British woman, Zin, who was pregnant when Mr Aamer was captured in Afghanistan in 2001.

The child, a boy named Faris, was born on the day Mr Aamer arrived at Guantanamo in 2002. By 2007, a classified US military report had concluded Mr Aamer was a ‘close associate’ of Osama Bin Laden and a ‘recruiter, financier, and facilitator’ for his Al Qaeda terror network.

He says he was simply in Afghanistan doing charitable work, and was sold by locals to the CIA who were offering $5,000 bounties. Mr Aamer claims he confessed to being a jihadi to end his torture at a CIA ‘black site’ on the Bagram US airbase in Afghanistan.

Previously, alleged British complicity in torture has led to payouts of £1 million each to other Guantanamo inmates such as Binyam Mohamed, who was released in 2009.

But Mr Aamer has festered at the notorious camp longer than any of them. President Barack Obama pledged to ‘prioritise’ the case in January, but nearly six months on he is still behind bars.

It is time to bring this long-running injustice to an end

The Daily Mail has long campaigned for the closure of the inhumane Guantanamo prison and has championed the release of Mr Aamer.

The Mail has described Mr Aamer’s incarceration without trial as an affront to justice and called for his release as a matter of principle in a right-thinking democracy.

In a comment article last month, we said: ‘This paper has always accepted that Aamer may be a bad man.

‘But every day that he remains in Guantanamo without having his innocence or guilt tested in a court is a grotesque affront to justice.’

Last night Mr Aamer’s MP, Tory Jane Ellison, said: ‘It is time to bring this long-running injustice to an end.

'The US authorities should look at the UK’s record of taking back Guantanamo detainees and successfully reintegrating them into society, and I call on them to release Mr Aamer to his family in the UK, my constituents, as soon as possible.’

No sleep in 11 days. Standing up for 20 hours. I'd have told them I was Bin Laden: Shocking torture revelations of Londoner held without charge since 2001

It is the first, and at times excruciating, account in his own words of how the last British resident in Guantanamo was tortured following his capture in Afghanistan 14 years ago.

For 13 of those years, Shaker Aamer has languished at Guantanamo Bay in Cuba.

Last year, during one of the many stages in his battle to be released, he was interviewed by Dr Emily Keram to assess his physical and mental well-being.

But during her visits, Dr Keram was also told by Mr Aamer of what he says really happened when he was handed over to the Americans more than a decade ago at the US Bagram airbase in Afghanistan at the height of the war on terror.

Shaker Aamer claims a British MI5 agent was in a room with ten other interrogators, one of whom repeatedly slammed his head into a wall

The medical assessment was arranged by Mr Aamer’s lawyers and the full transcript has not been made public before.

Mr Aamer, now 48, told his doctor: ‘I was not a human being any more. I meant nothing to them. I lost my dignity, my pride.

‘I had to take off my underwear and hand it to them. I had sleep deprivation for 11 days. That made me crazy. They poured cold water over me. They kept me standing for 20 hours a day. I had to hold my hands and arms out.

All of the statements I made at Bagram were during the sleep deprivation. I would have said anything

‘All of the statements I made at Bagram were during the sleep deprivation. I would have said anything.

‘I told them, “I will tell you I am Bin Laden if you want me to”.’ He said he was shaken, hurled to the ground and had his head banged into a wall.

On one occasion, he claims a British MI5 agent was in a room with ten other interrogators, one of whom repeatedly slammed his head into a wall. ‘They do that until you are shivering, until they have broken you, until your mind is completely empty,’ he said. ‘You feel like you’re not real any more. Like it’s a dream.

‘And now the worst part comes. They treat you with kindness. It destroys you completely. Your thinking is paralysed. Your feeling is paralysed. And the interrogator says, “I am trying to help you.”

‘You don’t know what to love and what to hate because it’s all happening at the same time. They bang your head on the wall and then they give you a hot meal.’

Mr Aamer said his worst moment came when an interrogator talked about sexually abusing his five- year-old daughter ‘in details that destroyed me’. ‘He said “They are going to s**** her. She will be screaming, ‘Daddy! Daddy’.

Former US special envoy for Guantanamo, Cliff Sloan, said there were ‘no adequate explanations or justifications’ why prisoners already approved for release from the camp were still inside

‘In the end, I offered to my interrogator to sign that I am Al Qaeda, everything the interrogator wanted me to sign.’

After 25 days at Bagram, Mr Aamer says the guards held a ‘goodbye party’ for him – in which he was treated to a fresh round of beating.

With other prisoners, he was shipped to another US base, at Kandahar, where they held a ‘welcome party’. He said: ‘They told the soldiers they could do anything they wanted with the detainees. They put us face-first on cold concrete. We were shivering. They hit me with gun butts, kicked me with boots, and stomped on my back.’

Mr Aamer says when they attacked a 17-year-old prisoner, he yelled in English at the guards to stop.

They put me in a cage for four days and pretty much left me alone

‘Because I spoke English, the soldiers said, “He’s a traitor. He speaks perfect English”. They beat me even harder,’ he said. ‘A black female soldier stopped them, saying, “You’ve had your fun”.’

He was kept awake for days on end, and if his eyelids drooped, a guard would beat him. ‘They shook me, threw me on the floor, made me hold my arms out, hit my hands. There was a nice thick blanket lying on the floor, but if I reached for it they would start beating me.’

He described how two interrogators named John and Tony ‘and a guy named Sallie or Sal’ worked in three- and six-hour shifts around the clock for ten days.

Mr Aamer said: ‘They put me in a cage for four days and pretty much left me alone. A British agent came to see me, a young officer with a red beret. I wouldn’t talk with him because he said he couldn’t do anything to help me.’

Mr Aamer – known simply as ‘Detainee 239’ at Guantanamo – claims a third MI5 officer visited him after his arrival at the US prison camp in Cuba.

'NO SOUND REASONS' FOR KEEPING INMATES LOCKED UP, SAYS FORMER SPECIAL ENVOY FOR GUANTANAMO Closing Guantanamo Bay is a ‘solvable problem’ and there are ‘no sound reasons’ for keeping many of its inmates locked up, a former U.S. special envoy has declared. Cliff Sloan told MailOnline there were ‘no adequate explanations or justifications’ why prisoners already approved for release from Guantanamo were still inside. Briton Shaker Aamer, 48, and many of the 56 other inmates cleared for transfer out of the facility, have been languishing inside for up to 13 years without charge or trial. Mr Aamer has been cleared twice, both more than five years ago, but has yet to return to his wife and four children in London. Mr Sloan, the US State Department’s envoy for Guantanamo until the end of 2014, said it was high time his own government got its act together. Speaking exclusively to the Mail from his office overlooking the White House, Mr Sloan said he knew the reasons behind each prisoner’s continued detention. President Barack Obama pledged to ‘prioritise’ Mr Aamer's case in January, but nearly six months on he is still behind bars He said: ‘Although I can’t speak to individual cases, in general there are issues that need to be addressed, discussions with other governments, but frankly I do not think any of those are adequate explanations or justifications - I think there is not a sound justification for delaying those approved for transfer.’ Mr Sloan, who was tasked by President Obama with negotiating prisoner transfers, condemned the continued detention of those already cleared as ‘profoundly unfair’ and said it diminished America in the eyes of the world. He said: ‘This is a solvable problem. The President came into office determined to close. Nobody should underestimate President Obama’s commitment to close Guantanamo. He feels very strongly about it. He has been very clear about it. I have heard him say that directly and very explicitly. ‘And so I think that it absolutely is something that is achievable and there’s a clear path to closing Guantanamo. It’s very important in reaching that goal that we see transfers every month and we move forward, and there not be a delay in progress.’ He predicted Guantanamo would close within President Obama’s presidency, which ends in January 2017. ‘I believe that President Obama will accomplish his goal of closing Guantanamo, but I think that again, in order to do that, it is past time that we start seeing very real progress every month.’ Mr Sloan said a senior security official from one of America’s staunchest allies on counter-terrorism (not from Europe) told him: ‘The greatest single action the United States can take to fight terrorism is to close Guantanamo.’ Mr Sloan, a lawyer, told MailOnline: ‘There are very serious problems that Guantanamo presents to the United States. It actually weakens our national security because it gives our enemies a very potent propaganda and recruiting tool. Briton Shaker Aamer, 48, and many of the 56 other inmates cleared for transfer out of the facility, have been languishing inside for up to 13 years without charge or trial ‘It frays our alliances with our closest allies and partners, it is wildly expensive to keep people at Guantanamo, it drains national resources and it is profoundly unfair to be continue to hold people who have been approved for transfer for more than five years who have been held at Guantanamo for 12 or 13 years without charges. ‘And so for all of those reasons I think it is very much against the United States’s national interest to continue to have the Guantanamo facility open, and delaying transfers when we could be moving forward with transfers.’ Asked if foreign governments such as Britain needed to offer greater security assurances, he suggested the onus was more on Washington, saying: ‘I think both the United States government and foreign governments need to move forward with great urgency and promptness, but I very much direct that to the United States government as well.’ He added: ‘I will say that I personally feel very strongly that when there is a situation where there are not concerns about the security capabilities of the country or any inhumane treatment and there is a possibility to transferring somebody approved for transfer, then it should be done as promptly as possible.’ Mr Sloan, who was Guanatamo envoy from July 2013 to December 2014, said: ‘What I’m most proud of is that we made considerable progress on moving people out of Guantanamo. When I started, many people advised me progress was impossible. They were wrong. There were 166 and we were able to move 44, and there are 122 now. So I was pleased we made progress. Mr Sloan said he believed ‘meaningful progress’ was being made behind closed doors on moving the 57 approved for transfer towards the Guantanamo exit. He said: ‘Sometimes people say these detainees are the most dangerous or the “worst of the worst”, and what I say is that in many cases they are the ones with the worst luck.’ Advertisement

He described hellish torture techniques including the CIA’s ‘frequent flyer programme where they move you every two hours’. Cruel guards at Guantanamo exploited his allergy to a cleaning fluid called Pine-Sol by frequently spilling it outside his cell. Mr Aamer has repeatedly joined and even led hunger strikes at the prison, and been force-fed by camp medics.

The author of Mr Aamer’s medical report, Californian independent psychiatrist Dr Keram, said he suffered traumatic episodes just by being asked to describe his severe maltreatment to her.

She said: ‘At those times, he either stopped talking or repeatedly engaged in apparent efforts to distract himself from painful and disturbing memories by suddenly and loudly singing. The lyrics [from the Eurythmics hit, Sweet Dreams] he sang referred to his maltreatment: “Sweet dreams are made of this. Who am I to disagree?

“I travel the world and the seven seas. Everybody’s looking for something. Some of them want to use you. Some of them want to get used by you. Some of them want to abuse you. Some of them want to be abused.”

‘He would then lose the thread of our discussion.’

Bob Marley’s Get Up, Stand Up (For Your Rights) is another song he sometimes belted out.

Dr Keram said Mr Aamer was paranoid that his Guantanamo cell had been fitted with an ‘electromagnetic beam’ that could be switched on by remote control to harm him. She said he compulsively cleaned his cell twice daily.

In a bleak assessment of Mr Aamer’s declining health, she said he felt ‘irritable, sad, angry, hopeless and helpless’, and suffered severe edema, tinnitus, debilitating headaches, asthma, ear pain, worsening vision and kidney pain. She further diagnosed post-traumatic stress disorder and depression. She said he was suffering from anxiety, paranoia, insomnia and other serious psychological problems.

‘He is profoundly aware of what he has lost. He feels guilty about not parenting his children.’