Dr Allan Dodds writes: Today I returned from a week’s holiday in Scotland where everyone has to wear a mask in a shop. I visited a shop in Central Avenue today where two customers were neither wearing masks nor observing social distancing. I enquired at the counter as to whether masks were compulsory in England and was told they were. I then pointed out the two customers who were not wearing masks, to be told, “We’ve stopped challenging people about masks because of the abuse we receive”. In Scotland the incidence and prevalence of Covid-19 are significantly down, whereas in England rates are still around 700 per day. I wonder how best mask wearing can be enforced as the antisocial behaviour I witnessed today must surely contribute to the current rates of infection and if shopkeepers feel intimidated by aggressive customers there is no correction to their bad behaviour.