In Sainsburys we don't have to wear masks if we are behind screens, although most choose to. Staff with hidden disability also don't have to wear masks, but they do have to wear a visor. It's very difficult to not be in close contact with work colleagues, as we can work in confined spaces, and have to share equipment etc. We often see our work colleagues for longer in the day than our own family's and we've come to think of it was a 'work bubble'. I'm not saying this is right, but we don't have much choice but to get on with our jobs.