This submission to the UN Committee Against Torture (UNCAT) identifies the key issues that REDRESS believes the United Kingdom must address when it provides its 6th Periodic Report to UNCAT in May 2017. The concerns include insufficiencies in the investigation of war crimes and torture allegedly committed by British soldiers in Iraq; flawed inquiries by the Intelligence and Security Committee (ISC) into UK complicity in torture in the context of counter-terrorism activities; the indefinite or lengthy immigration detention of migrants, asylum seekers and refugees, and their treatment in detention, and the lack of prosecution of torture suspects who come within the UK’s jurisdiction.