8395 businesses in the UK according to ONS, UK business: activity, size and location 2026 (enterprises in March 2026, published 24 September 2026). Partial coverage of the industry: classes 47.73 dispensing chemists in specialised stores (6,550) and 47.74 retail sale of medical and orthopaedic goods (1,845) combined. Opticians are not included: UK SIC 2007 has a subclass 47.78/2 retail sale by opticians, but the ONS only publishes the whole class 47.78 (17,455). This is a figure from official statistics, not the size of our dataset.