Sainsbury’s is enforcing single shopping to cut queue lengths at its stores.
If couples or groups arrive at one of the chain’s stores, only one adult will be allowed inside to shop, though people with children who cannot be left at home will be exempt.
In a letter to customers, Sainsbury’s chief executive Mike Coupe wrote: “From today, we are asking everyone to please only send one adult per household to our shops.
“This helps us keep people a safe distance apart and also helps to reduce queues to get into stores.
“Our store teams will be asking groups with more than one adult to choose one adult to shop and will ask other adults to wait.
“Children are of course welcome if they are not able to stay at home.”