Well, I have gone the NHS route myself... but I was waiting so long for CHX to get their act together that I strongly considered going to Dr Lorimer privately. I contacted Dr Lorimer's office and found everyone (including Dr Lorimer himself) extremely helpful. But I then found an alternate route to make my NHS wait much shorter, and I'm successfully transitioning on the NHS.
Dr Lorimer and Dr Curtis both have a lot of satisfied patients who would recommend them, so if you want to go & see one of them, why not give them a ring or send them an email? You could then choose which one you'd like to see based on what you think of their responses (because in all honesty they both do good work, so your choice could simply come down to personality).
You're also entitled to start your transition with one of these private clinics, and then move over to the NHS when you get an appointment there.
And Sarah? If you know you're ready, you're ready.