The Health Protection (Coronavirus, Restrictions) (England) Regulations 2020. They came into force at 1pm yesterday.
We advise that you read the full Regulations if you think your business is affected but in summary, Schedule 2:
Part 1 – lists those businesses which must close, except for the purpose of takeaway food (for example restaurants, cafes, canteens). Part 2 – lists about 20 categories of businesses which must close (for example cinemas, beauty parlours and outdoor parks)
Part 3 – lists about 18 categories of businesses which do not need to close (including food shops, newsagents, pharmacies, petrol stations and vets)