It is hard to know what Liz Truss hoped to achieve by storming off stage during an event in Suffolk promoting her new memoir. The former PM did so after campaigners unfurled a banner emblazoned with the phrase: ‘I crashed the economy’ below a picture of a lettuce. All that Truss, who lasted just 49 days in office, succeeded in doing was to draw even more attention to the prank – the clip has amassed over six million views on social media.