Media playback is unsupported on your device

Guardian defends leaks as MI5 accuses newspaper of damage

9 October 2013 Last updated at 15:42 BST

The Guardian newspaper has defended itself against publication of files leaked by the American intelligence analyst Edward Snowden, after the new head of MI5 said the leaks caused enormous damage.

In his first public speech, Andrew Parker also said security services must be given access to the many means of technology and communication used by terrorists.

Frank Gardner reports.

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.