The first thing to know about Greencore is that its share price was clobbered by Covid, and unlike the rest of the market, never recovered. The following chart compares Greencore’s share price to the FTSE All-share, an index of large and medium-sized UK companies. Greencore was, like the airlines and the hotels, one of the companies most exposed to Covid. In the UK, one of the world's largest markets for pre-made sandwiches, it is the largest producer. Those sandwiches are typically purchased by busy individuals during their lunch hour and are swiftly consumed. As Covid-19 has faded away, people are…