Everyone has their own Covid-19 story, and here’s mine. I caught it in Marks & Spencer in late March last year, when 200 clearly deranged panic-buyers set about stripping the store of its every last ready meal. Web designers grasping the last known packet of Our Best Ever Prawn Cocktail, estate agents fighting over the gooseberry and elderflower yoghurts: it felt like the end of times, and was actually one of the scariest experiences I have ever had.