David Cameron was urged yesterday to raise the case of the last remaining British resident in Guantanamo Bay when he travels to the US to meet with President Obama next month.

Shaker Aamer, from south London, has been cleared for release from the US prison camp since 2007 but he remains incarcerated without charge or trial.

During his time at Guantanamo, Mr Aamer has suffered appalling abuse and torture and his physical and mental health have suffered as a result.

The British government, which has repeatedly said it wants Mr Aamer returned, faced renewed calls earlier this month to step up their efforts to secure his release.

Now legal charity Reprieve — which represents Mr Aamer — called on Prime Minister Mr Cameron to raise his case when he meets the US President.

Reprieve legal director Kat Craig said: “For years, the British government has stated its commitment to securing Shaker’s return to the UK — now is the time for the Prime Minister to act decisively to bring him home and reunite him with his family.”