Hi welcome to the forum. Please please, whatever you do, spend sometime doing your research before you jump into a HT. And whatever you do, stay away from harley street.
There are a list of surgeons on here who do outstanding work, and i would strongly recommend you check out there work before you proceed. I travelled to america from the uk to have my HT, with the exchange rate as it is, it will still work out cheaper than having it done in the uk. Most people like myself on here have had to travel abroad to have repair work for a poor HT conducted in the uk.
Best of luck