MI6 chief Sir John Sawers said the leaks from NSA whistleblower Edward Snowden "have been damaging and put operations at risk."
Al-Qaeda is "lapping up" the leaks and Britain's enemies are rubbing their hands with glee, the British intelligence chief added.
More top news
Lincoln City and Millwall have learned their FA Cup quarter-final fate after their giantkilling antics.
The Good Morning Britain presenter announced he would host the RTS awards because of the "silly noise" of a campaign to ban him.
The global food company has 'amicably agreed' to withdraw its £115bn offer for the consumer goods company.