I sincerely hope you’re not reading this on a holiday flight that’s sitting on the tarmac with no indication as to when it might take off – or a sad train home after your flight was suddenly cancelled. Brace for three-hour delays at security, we’re told; don’t even try checking bags in, and at worst, as happened to Tui passengers at Manchester who thought they were going to Kos, watch out for a text after you’ve boarded telling you you’re going nowhere at all.