So now we know the threshold at which Nicola Sturgeon pulls the trigger. If the number of daily hospital admissions for Covid-19 exceeds a tenth of the number recorded at the April peak, she will lay waste to the hospitality industry. From Friday, all pubs and licensed restaurants in Greater Glasgow and Clyde, Lanarkshire, Forth Valley, Lothian and Ayrshire and Arran – where two-thirds of Scots live – will be forced to shut their doors for at least sixteen days.