"The colour scale was designed for accessibility reasons – for colour blind people like me, it’s easier to distinguish different colours when there is a gradient from light to dark instead of just changes in hue,” Mr McGivern said, adding that the colours had not been altered to instil fear.
"Since the darker reds correspond to temperatures in excess of the UK temperature record [38.7C in Cambridge in 2019], they were only ever intended for the hottest parts of the world,” he continued.
"I never imagined I’d end up seeing them in the UK. The doctored image has those darker reds on it but with much lower temperatures written on the map, which is why it looks like the image was faked."