I've been with Newson Health for about 2-3 years now. I've also been with 2 different private online thyroid doctors who work along similar lines but for thyroid.
I love Newson Health and don't know what I've have done without them, but I have found it took me until my 3rd doctor there to find someone I thought really knew their stuff and could work with my complex situation. It's pretty easy to switch to another practitioner and they have loads. Choose one of the 'senior/advanced' doctors, as they cost the same as the others! The first doctor I saw there, I just didn't get the sense that she knew me as an individual, it was all very polite but impersonal and not really thinking outside the box. The second doctor I saw, left... I'm now with Dr Jane Robertson there and really like her.
My Newson doctor writes a letter which I give to my NHS GP which specifies the dosages I'm on. Even though I'm on a ridiculous 12 pumps of gel, my NHS GP is happy to prescribe that along with the utrogestan at 300mg/night. So I don't have to pay for these meds. However, my NHS GP won't give me the testosterone, so I have to get that from Newson privately. It's pretty cheap...
I really don't trust the NHS with anything menopause. I don't trust that meds will continue to be available. (From Estradot to utrogestan, things go out of stock.) I don't trust that products are reliable (Oestrogel and now Estradot). I don't trust that I will have access to the meds I need (testosterone). And I don't trust their ability to deal with anything non-standard or slightly complex. So doing this only via the NHS is not something I can risk. I need a backup provider to fill in the gaps, to give me the meds that my NHS GP tells me are out of stock or refuses me. I don't have health insurance or tons of money, I just have to prioritise this as an expense. I'm not going on holiday this year.
For thyroid care, I highly recommend Dr Momi at Functional Thyroid Care. He prescribes T3 and doesn't go by TSH and is a lovely doctor. Hopefully I will be off thyroid meds soon...