The last British resident held at Guantanamo Bay has been released, according to reports.
Shaker Aamer, 46, whose wife and young children live in London, has been detained at the military prison in Cuba for 13 years.
Andy Worthington, co-director of the We Stand With Shaker campaign, said he had informed by Mr Aamer's lawyer that he is due to return to the UK today.
He said: "We're delighted to hear that his long and unacceptable ordeal has come to an end.
"We hope he won't be detained by the British authorities on his return and gets the psychological and medical care that he needs to be able to resume his life with his family in London.
Human rights charity Reprieve wrote on Twitter: "Looks like a plane has left Guantanamo Bay, bound for London."
But a spokesman for Reprieve said it had no confirmation of Mr Aamer's release and it would not receive advance warning.