By Adam Vaughan and Anna Menin Britain must continue to be a world leader when it comes to acting on global warming despite the EU referendum result last week, the UN’s climate chief has urged. Christiana Figueres warned that should article 50 be triggered it would bring uncertainty for two years but cooperation on climate change could be one area of continuity between the UK and EU. “Should that be the case [article 50 being triggered], there is going be quite a lot of uncertainty, transition, volatility for at least two years,” she told an audience of business leaders in London on Tuesday. “However, let us remember that the Brexit vote was not about climate change, it was not about should the UK continue to modernise its industry and its manufacturing, and it was certainly not a vote about innovation, which is fundamentally the opportunity that we have by acting on climate change,” said the outgoing executive secretary of the UN Framework Convention on Climate Change. Figueres, who played a key role in forging the Paris climate deal last December and is believed to be considering running for UN secretary general, riffed on the world war two poster “keep calm and carry on”. “Over these next two years, my suggestion would be to use the proverbial UK [message]: ‘stay calm and transform on [to a low-carbon economy]’. It’s not ‘stay calm and do nothing’, it’s ‘stay calm and transform on’ because the UK and EU have had a very important leadership on climate change, there’s no reason to change that whatsoever.” Asked if the Brexit vote would become an obstacle to action on climate change, she said: “No. Climate change action is by now unstoppable. It is global.” Weekly briefing: Sign up for your essential climate politics update A pre-referendum poll found that leave voters were more likely to be climate sceptics than remain voters, and green groups have raised fears that the Brexit vote could lead to “the climate change-denying wing of the Conservative party” being strengthened.