This is why Britain will suffer like Spain or Italy. There are always people who explain that using a mask or following lockdown regulations are of no use and too expensive. Just like winter tyres or de-icing equipment at your airports. If it decreases the risk of getting sick (or in fact spreading it if you are already sick but you still don't know) by only 5% then don't want to be smarter than the world but friggin get on with it.