I thought this might help someone- I didn't realise there are some NHS dental clinics set up for people who find it difficult to visit the dentist eg with health problems or housebound.
Thi is in the Bristol area but might be others around, I think there is a link to other areas through this website.
www.uhbristol.nhs.uk/patients-and-visitors/your-hospitals/university-of-bristol-dental-hospital/what-we-do/primary-care-dental-service-(pcds)/what-we-do/