Thank you for your replies I really appreciate your suggestions. We are back in Korat in March so will visit a few of the hospitals recommended and see what can be done.
Once of my concerns with doing nothing Alfie is the potential teasing he will endure during his school life, growing up is sometimes hard enough as it is so anything we can do to make that easier for him would be our preferred route.
I will update with the outcome in the future and once again thank you for responding.
Steve