W (Algeria) and others v Secretary of State for the Home Department [2012] UKSC 8; [2012] WLR (D) 69
“The Special Immigration Appeals Commission (‘SIAC’) could make an irrevocable non-disclosure order, without notice to the Secretary of State, where a witness, fearing reprisals, required an absolute and irreversible guarantee of confidentiality as a precondition to giving evidence relating to an appellant’s safety on return.”
WLR Daily, 7th March 2012
Source: www.iclr.co.uk