Britain is to investigate whether its security services played a role in the torture of British resident, Binyam Mohamed.Mohamed was released from Guantanamo Bay last month, after seven years in custody there and in other countries. The US alleged he was trained at al Qaeda camps and linked him to a “dirty bomb” plot. But all charges against him were dropped and the 30-year-old is now a free man. The British Attorney General, after studying the case for the four months, says there is enough evidence to launch a criminal investigation into his claims. Mohamed says he was subjected to “waterboarding” and other abuse during interrogations. He says this took place with the knowledge of British intelligence officers, and they supplied information that directed the questioning. Britain has denied any role in the torture, or collusion with other countries carrying it out. Some critics are calling for a broader, judge-led inquiry into the full role played by foreign and domestic security services in the case.