Shaker Aamer is "suffering from post-traumatic stress disorder", one of his lawyers has confirmed.
Speaking on the former Guantanamo Bay prisoner's first full day of freedom back in Britain, lawyer Ramzi Kassem said his client was suffering from "physical and psychological" conditions following his release.
Kassem told BBC Radio 4's Today programme: "He suffers from a number of conditions both physical and psychological, including post-traumatic stress disorder on the severer end of the PTSD spectrum."
Aamer is currently undergoing medical tests ahead of being reunited with his children.
Who will mourn Guantanamo Bay? Hardly anyone.
Shaker Aamer spoke to ITV News last week via his lawyer in his final interview before his release from Guantanamo.
Shaker Aamer, the last British detainee at Guantanamo, has been put on a flight back to the UK. Here's what we know about him.