In the longer term, we should establish “green zones” – areas where the virus has been judged to be under control, where there is no danger of infection and thus no need for restrictions. We’ll need a new system for accrediting Covid-safe environments, from workplaces to schools, shops, hospitality and transport, as we do with hygiene ratings for restaurants. This will require robust guidance, support, regulations and inspections to ensure that all public spaces meet agreed safety standards, with publicly displayed certificates and a hotline for reporting breaches.