If you don't even know about these organisations then you're not really qualified to talk about what doctors should or shouldn't be doing or what power they do or don't have.
How do you know they haven't? Just because things aren't perfect doesn't mean things can't be better than they were previously, the NHS has been around for 70 years after all.
https://www.bma.org.uk/
https://www.hcsa.com/
https://doctorsinunite.com/