The head of the U.K.'s National Cyber Security Centre warns that hostile nations like Russia, Iran and China are behind the most serious cyberattacks in the U.K. In a speech Wednesday, Richard Horne said British businesses need to prepare for large-scale cyberattacks, especially if the U.K. becomes involved in international conflicts.

European Union leaders are gathering this week at the end of political year dominated by U.S. President Donald Trump.

The head of Britain’s MI6 spy agency says Russian President Vladimir Putin is stalling efforts to end Russia’s war on Ukraine, and is testing the West with tactics that fall “just below the threshold of war.”.

The outgoing head of Britain’s foreign intelligence agency has given a wide-ranging speech on the threats facing the West as he prepares to leave office later this month.