We watched the film Thirteen Lives on Amazon last night about the thirteen boys who went exploring in a cave in Thailand and were then trapped deep within the caves by the premature arrival of the monsoon. Of course, I half remember it from when it happened, but had entirely forgotten, or maybe hadn’t known, that it was a couple of British amateurs who went out specially to help with the rescue. This forms an interesting aspect of the plot, which at a time when the British are being viewed, particularly by the current administration, as generally hopeless, lazy and incompetent is somewhat reassuring. But it is, of course, left-field thinking which solves the problems, not skill at elementary maths.