The news that more than 50 people have died in Greek wildfires is just one part of a very much bigger story. There have been near record temperatures across the northern hemisphere. Japan is calling it a natural disaster. Is this the new norm – is global warming hotting up?

Joining us at the Roundtable is Clare Nullis from the World Meteorological Organization; Friederike Otto, Deputy Director of the Environmental Change Institute; Tom Burke, Chairman of environmental think-tank E3G; and Chris Brierley from the department of Climate science at the University College London.