I had dreadful and painful experiences at the Tower Bridge Practice (NHS) on TBR. Work was carried out very poorly, rough handling and needed to be re-done repeatedly. We nicknamed them the Butchers of Bermondsey.
Moved to Sparkly Smile in Blackheath after one of their dentists did some mat leave cover on TBR. Couldn't be a more different experience. They are fabulous and highly recommended. Not cheap though.
I can thoroughly recommend MP Dental Practice in Jamaica Road Bermondsey, a short walk from Bermondsey Tube Station. I have been with them for years and as far as I know they are still taking NHS patients.