Sainsbury’s customers will be asked to keep wearing masks from Monday, after the legal requirement to do so is relaxed.
The supermarket said there would be symbols and tannoy messages to prompt customers to wear a face covering.
It joins the bookseller Waterstones, which mentioned customers should wear masks to shelter staff and other shoppers.
The government has stated it “expects and recommends” shoppers to wear coverings from Monday.
But the legal obligation to cover your face in enclosed spaces will end.
The new guidance leaves firms to choose their safety policies after 19 July, when Covid rules are lifted.
Several airlines have already mentioned they will continue to ask passengers to wear masks on-board, and masks will be instructed on the London Underground and other Transport for London services.
Timpsons, the shoe repair and key cutting chain, and jewellery retailer Beaverbrooks have stated. At the same time, plastic screens and other safety measures would stay in place, and staff would endure wearing face-coverings; customers would be left to choose the matter for themselves.
Sainsbury’s said its approach echoed feedback from customers and colleagues, with the majority of those surveyed favouring keeping the mask policy in practice.
“Our colleagues’ safety is vital and many of our colleagues would feel more comfortable if those who can wear face coverings continue to wear them,” Sainsbury’s chief executive Simon Roberts mentioned.
The chain stated some Covid measures, such as screens between self-service checkouts and checkout queues, would be slowly removed. But screens between checkout staff and customers will remain in place.
Some employers and unions have argued the government’s strategy, with the TUC calling it “a recipe for rising infections”.
General Secretary of the shop workers’ union Usdaw, Paddy Lillis, shared with BBC that he is “very disappointed that the government has not consulted broadly with unions and employers”.
“It’s a real mess,” he said.
“Instead of having the force of law behind them, [it] will create confusion and put more shop workers at risk,” Mr Lillis further mentioned.
In its advice, the government states, “Face coverings are no longer required by law. However, the government expects and recommends that people continue to wear a face covering in crowded, enclosed spaces.”
It would relate to offices, factories, shops, construction sites, and close-contact services such as hairdressers and beauticians.
It said it expected any coming back to work to be “gradual” and asked employers to keep using measures to lessen potential Covid spread, such as risk assessments, thorough cleaning and ensuring suitable ventilation.
However, much of the language in the guidance includes “encouraging” employers, staff and customers to “consider” measures that are already prevalent, such as hand-washing, sanitiser use and contactless payments.