LATEST: Johnson says UK working to bring diplomatic end to North Korea crisis

LATEST: Boris Johnson has said the regime of Kim Jong Un is responsible for the crisis over North Korea's nuclear programme and must now "fix it".

UPDATE 12.50: Boris Johnson has said the regime of Kim Jong Un is responsible for the crisis over North Korea's nuclear programme and must now "fix it".

In a series of posting on his Twitter feed, the Foreign Secretary said Britain was working with the United States and allies in the region to find a diplomatic solution to the stand-off between Pyongyang and Washington.