kv - welcome to MM
Most HRTs available on the NHS have bio identical oestrogen in them these days. Utrogestan(micronised progesterone), which is bio identical progesterone, is available on the NHS as well, so you don't need to spend a fortune seeing Prof Studd to get this.
There have been reports of very mixed experiences with Studd but I understand he has a team of two specialist gynaes that work with him who are very good - so if, having tried to get NHS help with no success - you feel you do want seek more specialist advice I would ask to see one of his colleagues.
How old are you? Do you know where you are in your menopause? Blood tests may help to diagnose but from the symptoms you are describing you are clearly in menopause, if only in the peri meno phase.
The issue for you is around problematic bleeding and HRT could make this worse. You will need progesterone alongside oestrogen anyway with any HRT regime as you still have a uterus. What you don't want is heavy, erratic or problematic bleeding and adding in some oestrogen could bring the bleeds back!!! You are probably in peri menopause and would have to have a sequential HRT at this stage which does involve a monthly bleed - unless you go for a Mirena.
I would go to your GP with all your symptoms, past history and questions written down so you can be clear and concise at the appointment and ask to be referred for specialist advice. Having a Mirena fitted may be your best option (the Mirena can protect the womb lining better than anything else with minimal problems) and you can then add in bio identical oestrogen as either patch or Oestrogel alongside and that will control the flushes and other meno symptoms.
There is a great deal of confusion about bio identical hormones and whilst the old fashioned oestrogens are being phased out in favour of the bio identical ones, unfortunately the bio identical progesterone can bring more side effects (as I experienced) than the more synthetic progesterones. The synthetic progesterones (which I suspect you are on) are more powerful and better at controlling problematic bleeding.
Read up all the info on this site to get clued up and see if the NHS can help.
keep us posted. DG x