British intelligence reportedly provided a vital tipoff to the US in 2015 about the extent of Russian hacking on the presidential election. The report on the UK’s involvement came after US intelligence agencies published an unclassified version of their finding that Vladimir Putin ordered a multi-pronged operation to interfere in the election in favour of Donald Trump. The New York Times, citing “two people familiar with the conclusions” of the report, said British intelligence was “among the first” to raise the alarm in autumn 2015 that Moscow had hacked the computer servers of the Democratic National Committee. The UK’s role suggests that the compromise of email exchanges among senior Democrats was spotted when voice intercepts, computer traffic or agents picked up content of the emails flowing towards Moscow. Over the course the campaign, British officials were as alarmed as their US counterparts over the extent of contacts between Trump advisers and Moscow and by Trump’s consist...