Shaker Aamer could be set to bring legal proceedings against the British Government "over its alleged complicity in his mistreatment", according to reports.
A source claimed "proceedings were initiated some years ago" on Shaker's behalf that "will now, undoubtedly, be progressed."
The father-of-four was the last British resident held at Guantanamo Bay up until his release this week after serving 14 years in the military prison.
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.