It was only after Miles Pickering arrived at Scotland Yard following his arrest that the police realised they had got things embarrassingly wrong.

The T-shirt worn by the Brighton engineer did not express support for a proscribed terrorist group, instead the words on it read “Plasticine Action” and inside the letter “o” was an image of the stop-motion character Morph giving two thumbs up.

Speaking to the Guardian, Pickering admitted it was designed to be an easy mistake to make, appearing to look like the logo of Palestine Action, the protest group banned under terrorism legislation last month, but text underneath the logo reads: “We oppose AI-generated animation.”