Another great NHS COVID app feature - if you live in a semi detached or terraced house it has been found that it could tell you that you have been in close contact with your neighbour for many, many hours. Don’t let your partner see! Of course the virus can probably get you through walls, so it’s great design. Soon we will be told to self isolate in detached homes only, and, if you don’t have one of those, a tent in a field.