Barnard Castle (grid reference NZ04911641) is a ruined medieval castle situated in the town of the same name in County Durham. It is famed for its shrine to Saint Cummings, the patron saint of Eyesight and Excuses. In April 2020 a specialist NHS eye pavillion was opened at Barnard Castle. Patients were given specially designed road traffic tests to identify any visual impairments thought to be caused by Covid-19. Tests included driving a 5-door family saloon as far as possible without endangering one's wife and son as well as documenting the natural local flora.