When I first heard this it sounded worrying for those who rely on them. However, a closer look they are in (current) areas of low footfall like airports, railway stations, deserted malls and the City of London. When I worked in the City they seemed primarily to be another lunch outlet and for the sale of vitamins, beauty products, etc. The larger ones had opticians.
Here is an article with the full list of affected branches. Does it affect anyone here?