Morrisons are to refuse entry to customers who refuse to wear a face mask unless they are medically exempt.
Chief executive David Potts said: “Those who are offered a face covering and decline to wear one won’t be allowed to shop at Morrisons unless they are medically exempt.
“Our store colleagues are working hard to feed you and your family, please be kind.”
Shoppers who flouts the rules and persist in not covering their nose and mouth will be told to leave stores by security.
Usdaw general secretary Paddy Lillis said: “Retail staff are working with the public every day and not only suffer increased abuse, but are deeply worried about catching Covid-19.
“Where safety measures are agreed, retailers need to make sure that they are being followed consistently, in every store.
“Supermarket workers and delivery drivers have worked throughout the pandemic to keep the country supplied with essentials.
“These key workers must be valued, respected and protected.”
