In this letter addressed to the Intelligence and Security Committee of Parliament, REDRESS and other NGOs question whether the decision of the UK government to ask this Committee to investigate the treatment of detainees and the UK involvement in rendition was lawful or appropriate.The organisations also reiterate the need to establish an independent judicial inquiry into these matters. The other NGOs are the AIRE Centre, Amnesty International UK, Cage, Freedom from Torture, JUSTICE, Liberty, Reprieve and Rights Watch UK.