Sainsbury's has updated its rules on who can shop in branches asking people to visit alone where possible.
Rules from the last lockdown - which saw many supermarkets asking people not to shop with partners or families - are being brought back by some chains.
Tesco, Asda, Aldi, Morrisons and Lidl have introduced measures to prevent panic-buying and keep shoppers safe - including reinstating priority access for NHS workers and the vulnerable, reports The Mirror.
The Sainsbury's update means couples will not be allowed to shop together and families should only enter stores with each other if children are not able to stay at home.
A message on the Sainsbury's website reads: "We have limited the number of people in our stores and at our ATMs at any one time.
"We have also put queuing systems in place outside stores and ask you to queue at a safe distance of two metres apart.
The grocer has also introduced a new charity scheme to support vulnerable and isolated communities ahead of Christmas.
Customers will be able to donate cash, food and other essential products in store and online, with the supermarket matching every donation between December 1 and 14.
Customers can donate at tills in-store by rounding up their bill on manned checkouts or by adding £1, £2, £5 or £10 donations to their basket on self-service checkouts.
Those shopping online can opt to add a donation of £1, £2, £5 or £10 to their online delivery.
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