“The Supreme Court had jurisdiction to entertain a closed material procedure on an appeal from decisions of the courts of England and Wales on applications brought under section 63 of the Counter-Terrorism Act 2008. On very rare occasions it would be appropriate for the court to go into closed session for that purpose and in the circumstances of the present appeal it would do so.”
WLR Daily, 19th June 2013
Source: www.iclr.co.uk