Supreme Court Published March 19, 2012W (Algeria) and Others v Secretary of State for the Home DepartmentBefore Lord Phillips of Worth Matravers, Lord Brown of Eaton-under-Heywood, Lord Kerr of Tonaghmore, Lord Dyson and Lord Wilson Judgment March 7, 2012It was open to the Special Immigration Appeals Commission to make an irrevocable non-disclosure order, without prior notice to the Home Secretary, when a witness, fearing reprisals, required an absolute and irreversible guarantee of permanent confidentiality, as a precondition to giving evidence relating to an appellant?s safety on return to another country.