Boris Johnson

"We are looking at ways of making sure that people really do have face coverings in shops, for instance, where there is a risk of transmission."

Labour said it supports a move to compulsory mask-wearing in shops, explaining it may actually help to encourage greater spending.

Shadow Cabinet Office minister, Rachel Reeves, said it would inspire greater confidence and might encourage more people to go out and spend money".

"I think people are increasingly wearing them but I think some greater clarity from government about that, I think, would be helpful," she said.

"People want to do the right thing but they want to know what the right thing is. We already have it on public transport."