“The Daily Telegraph’s David Barrett tweeted out some of the details from the statement made Friday by Oliver Robbins, deputy national security adviser for intelligence, before U.K. judges. ‘The material seized is highly likely to describe techniques which have been crucial in life-saving counter-terrorist operations, and other intelligence activities vital to U.K. national security,’ Robbins said. ‘The compromise of these methods would do serious damage to U.K. national security and ultimately risk lives.’ The government told The Guardian newspaper that it had ‘no confidence in their ability to keep the material safe.’”
http://www.businessinsider.com/david-miranda-glenn-greenwald-documents-national-security-2013-8