Hi LG, there's no nice way to say this. Your consultant sounds like a right C***. How unfortunate that you drew the short straw with him. However, even a more helpful NHS consultant has their hands tied when it comes to supplying the drugs we need, courtesy of Big Pharma's pricing and NHS collusion with it.
Now, you have got me started on UK dentists, which are another UK professional body straight out of the dark ages. I could rant on about them for hours but will try to restrain myself. Their greed is every bit as invidious as Gilead's. They insist you have to be registered with them even if you only want one little filling. My (private) dentist thinks that taking the time to match the colour of my front tooth with a filling is beneath him. He only likes the £500 root canal jobs - which then fail. Even the hygienist was salivating on my first visit hoping that she'd got another old fart with gum disease who'd need expensive periodontal treatment. When she found my gums perfectly healthy her face changed like she'd just sucked a lemon. I'd go someplace better but I've already been all over town and not found better and got myself a reputation for switching dentists (a bad thing, must be my fault). I really feel trapped in a system which is not serving my interests. To their credit, opticians don't do this. I can walk in to any optician and get service. Which makes it even more irritating that with dentists I can't.
My point is that the UK is riddled with closed shops. We are just the cash cows for their convenience and they tie us up in knots with this enforced registration and transfer of records. The only viable action we can take is the one you are proposing. Go overseas to another country for treatment. If the UK population did this in droves then these dentisits would all go out of business, which they so richly deserve to do. Same for generic meds. India, China, Bangladesh & elsewhere will do business on our terms so take our business there.