Hi Janey- can't help you re Wales but it sounds similar to Scotland. HRT and Utrogestan isn't available although it's licensed for assisted reproduction.
I ended going to see a consultant privately ( nhs and private practice) who wrote to my GP and told her to prescribe it on the NHS. So, I get it no problem. Not sure if she's checked the prescribing guidelines though!
You may have to do something similar? Or why don't you e mail Dr Currie and ask for her advice ( although she is based in Scotland)