Morrisons has said customers who refuse to wear a mask without a medical exemption will be told to leave stores from today.
The move comes as we remain in a third national lockdown.
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.”
Prof Chris Whitty has urged people to minimise unnecessary social contacts.
Sunday’s figures showed another 563 deaths in the UK within 28 days of a positive Covid test, and another 54,940 cases. There are also more than 32,000 people in hospital with coronavirus, the latest data shows.