Greencore is as a business as heavily exposed to Covid as you’ll find. It’s the biggest producer of pre made sandwiches in one of the biggest market for pre made sandwiches in the world, the UK. Those sandwiches are usually bought by busy people on their lunch break, and consumed quickly.  Covid has hit Greencore in three ways. One is that people aren’t in train stations or city centres as often. Another is, when working from home, workers have other food options. And another is that workers in sandwich factories, like those in meat processing plants, work cheek by jowl.…