As masks reduce the spread of the virus, I think it would be reasonable to expect the staff in supermarkets to wear simple masks. With so many staff picking food from the shelves in Tesco for online delivery customers, it was impossible to keep 2 metres apart in the aisles. I was wearing a simple mask to reduce the chance of spreading the virus should I be presymptomatic or asymptomatic and I would have felt more at ease if the staff were also wearing masks (provided by Tesco. Aibu?