A US thinktank with close ties to Donald Trump has obtained accreditation for a delegation of climate science deniers to the UN summit currently underway in Madrid.

Organisations accredited to attend on behalf of the Competitive Enterprise Institute, which has received significant funding from oil giant ExxonMobil and the Koch family, include the UK’s Centre for Policy Studies, the Chicago-based Heartland Institute and the European Institute for Climate and Energy.

Climate change is arguably the most significant issue facing the world right now. So you’d be forgiven for thinking this is an issue on which it would be easy to hold politicians to account. But you'd be wrong.

DeSmog collaborated with the Guardian to analyse which of the UK’s MPs have the best and worst records on climate change. We’re very pleased with the Guardian’s climate score league table, and think it offers a fair reflection of where most MPs sit on the issue — today and over the past decade. 

With Boris Johnson (who scores terribly, by the way) poised to call a general election as soon as Parliament will let him, and more people than ever caring deeply about climate change, now seemed like the perfect time to do the analysis.

The BBC has altered its editorial guidelines after persistent calls for the organisation to improve transparency around the commentators to which it gives a platform.

The broadcaster has now added “think tanks” to a list of groups that it says presenters and producers should “not automatically assume … are unbiased”.  “Appropriate information about their affiliations, funding and particular viewpoints should be made available to the audience, when relevant to the context,” the guidelines say.

The change could have significant ramifications for representatives of anti-regulation, pro-Brexit think tanks and campaign groups based in and around offices at 55 Tufton Street, including the UK's principal climate science denial campaign group the Global Warming Policy Foundation, on which DeSmog has extensively reported.