The 15 members of the UN Security Council are expected to begin closed-door talks on North Korea in the coming minutes.
The scheduled meeting in New York is to discuss a draft resolution that would sanction the country for its third nuclear test last month.
UN diplomats have told Reuters new agency they expect to vote on the draft resolution by the end of this week, although it could face opposition from China.
More top news
This defeat for Theresa May matters: it shows the fury among some MPs, notably those who voted to Remain, that they are being ignored.
Theresa May's government has been narrowly defeated in a key Commons vote after a rebellion by Conservative MPs.
Despite temperatures reaching double figures in the south today, it was still a chilly day, with brisk winds.