Government platitudes over the ongoing ordeal of the last British resident in Guantanamo are no longer enough, campaigners warned yesterday as damning new evidence of mistreatment emerged.

Shaker Aamer, from south London, has been detained at the US gulag since 2002 without charge or trial despite having twice been cleared for release by the US authorities.

During this time he has been subjected to appalling abuse and regular beatings.