The legal representative of the prisoner free from Guantanamo, human rights advocate Clive Stafford-Smith, stressed that his client most desires an independent investigation into the United Kingdom’s role in his treatment.
"What he [Aamer] does want is that the whole world should know what did happen so we can set in place rules so that British agents and, let's hope, American agents don't get involved in the torture business in the future," Stafford-Smith told BBC News on Saturday.
The last British inmate in the US Guantanamo Bay detention facility in Cuba was released on Friday having spent over 13 years in jail.
Shaker Aamer was born in Saudi Arabia, but holds British residency and his family lives in London.
The 46-year-old was seized by bounty hunters while working as a charity worker in Afghanistan shortly after the 9/11 attacks in 2001. He was accused of allegedly aiding the al-Qaida terrorist group and was handed over to US forces before being transferred to Guantanamo Bay in February 2002.
Aamer has repeatedly and resolutely denied the charges.
British Prime Minister David Cameron raised his case with US President Barack Obama at the G8 summit in Lough Erne in 2013.
"We had a promise from the prime minister that there would be a fully independent inquiry into all of this torture — unfortunately that's not happened yet,” Aamer’s lawyer told BBC.
The release of the British resident from Guantanamo Bay brings the total number of prisoners remaining in the facility to 112.
On Thursday, the US Defense Department announced that Guantanamo prison detainee Ahmed Ould Abdel Aziz had been released from the detention facility and sent to his home country of Mauritania.