Iceland said photographs of empty shelves in supermarkets, signs of panic buying, were isolated incidents. While there were ‘some availability issues’, they said their supply chains are resilient. M&S and other businesses said growing numbers of staff have been ‘pinged’ by the NHS Covid-19 app and they must self-isolate for 10 days. Businesses want people who have been double-vaccinated or have daily tests to be able to return to work. The British Retail Consortium said shops were facing increasing pressure as they try to keep shelves stocked with rising numbers of staff self-isolating. It said ministers needed to ‘act fast’ and allow fully-vaccinated retail workers or those who had tested negative for Covid to go to work. The Road Haulage Association said a shortage of 100,000 HGV drivers is disrupting supply chains as workers return to Europe following Brexit.