I agree Karidis has a good reputation and I would personally rate him as the British number one based on my research.
You'll need to book a consultation on 0207 432 8727 .
Then you can arrange your travel via this nifty site :
http://www.transportdirect.info which will plan out all your walking/buses and trains door to door.
His offices are: The Hospital of St. John & St. Elizabeth, 60 Grove End Road, London NW8 and 43 Devonshire Street, London, W1G 7AL.
No I dont work for him! (I had surgery in Poland, dig deeper and you'll see my experieces.)
Good luck, it's never to late to sort it out!