But many stores have taken action. Health and beauty chain Boots, for example, has kept its stores open for pharmaceutical goods, but has closed its in-store beauty and fragrance counters.
Marks & Spencer has kept its food halls open to customers, but closed down its clothing and home operations after the government said non-essential shops must close.
One unnamed worker, quoted in evidence published by the House of Commons business select committee, said: "They are also forcing all Argos workers from their closed standalone stores, to go and work in the stores that are still trading, or a local Sainsbury’s, rather than allowing them to stay at home (where the government says they should be).
Another Argos employee tweeted: "Argos is making us standalone store workers go to Argos in Sainsbury’s stores which are still open or work in the delivery hub or we DON’T GET PAID.