It’s time for the dreaded weekly grocery shop. You change into something more presentable for the public (you’ve donned the same sports leisure wear all week while working from home), and you might even reach for a pair of gloves and a protective face mask. You walk to the nearest grocery store to find a line-up so long that it’s snaking around the block. Shoppers are stood on tape markings six feet apart from each other, and a security guard armed with hand sanitizer is letting groups in 10 at a time. Welcome to grocery shopping amid a global coronavirus pandemic.