Our local dentist practice was really good. DH and I were NHS patients.
Recently they sold out to a dental chain which has 4 or 5 practices. The dentist we saw now only takes private patients.
The dentist I saw recently tried to give me the hard sell, telling me that my teeth needed deep cleaning, I disagree. I told him quite truthfully, that my nephew's wife is a dentist, and I would ask her about it. He has not mentioned it since.
He saw my DD and told her she needed veneers! She has motled teeth due to a problem with porous enamel, veneers would ruin her teeth!
She complained about him.
These chains are all about making money. Do not be taken in by them.