Climate change is once again dominating the news agenda. A report from the Intergovernmental Panel on Climate Change warned that even if emissions are cut rapidly, the effects of global warming will be felt across the world. The report – which Boris Johnson has declared sobering reading – leads the news today, with the BBC dedicating seven stories on its homepage today to climate change.

So just as well then that BBC staffers were recently treated to an internal audience research briefing telling them how best to convey messages about climate change to different audiences.