UK says North Korea nuclear test is reckless, could bring a "new order of threat"

"There's no question that this is another provocation, it's reckless," he told Sky news. "They seem to be moving closer towards a hydrogen bomb which, if fitted to a successful missile, would unquestionably present a new order of threat."

Pyongyang conducted its sixth and most powerful nuclear test earlier on Sunday.

He said Britain's preference was for a diplomatic solution and that none of the military options relating to North Korea were palatable.