Climate activist Donnachadh McCarthy did not hold back in a frosty row on GB News with travel journalist Simon Calder, as he suggested the frequent flyer is responsible for tonnes of emissions.

He hit out at Calder’s career choices amid new calls for the world’s richest to pay a new ‘climate tax’ after it was revealed those in the top one per cent of earners emitted as much carbon in 2019 as the poorest 65 per cent.