British Museum must sever its links with BP | Letter from Margaret Atwood, Mark Ruffalo, Mark Rylance, Tom Kibble, Naomi Klein, Emma Thompson, Vivienne Westwood and others

Letter from Margaret Atwood, Mark Ruffalo, Mark Rylance, Tom Kibble, Naomi Klein, Emma Thompson, Vivienne Westwood and others

We congratulate Dr Hartwig Fischer on his new role as director of the British Museum (Profile, 1 April), and would like to take this early opportunity to raise an ethical issue of great concern to us all. As the impacts of climate change are being felt more forcefully around the world, it is vital that prominent public institutions like the British Museum play their part in minimising the environmental impacts of their activities.

BP's sponsorship contract with the museum is coming to an end this year. While governments in Paris committed to transition away from fossil fuels, BP remains a barrier to progress. It is working to extract new sources of carbon-intensive oil from the tar sands, the Arctic and under the oceans, when we need to keep at least two thirds of known fossil fuels in the ground. BP's business plan is incompatible with a stable climate, and the company is using its influence to lobby against effective climate policies.