UK intelligence gave US key tipoff about Russian hacking, report says

Donald Trump tweets defiance as New York Times sources say Britain 'among first' to raise alarm over hacking of Democratic National Committee

• Coats is Trump intelligence pick as president-elect touts Russia relations

British intelligence reportedly provided a vital tipoff to the US in 2015 about the extent of Russian hacking on the presidential election.

Related: US intelligence report: Vladimir Putin 'ordered' operation to get Trump elected