Thank you very much for your responses. Much appreciated.
Mumofthree - thank you so much for your PM - that was very interesting and I will look at that further. Really glad that your daughter is improving. Yes it must help to know that your husband was the same. I was a model student, keen to please and dont think our son takes after my husband either. I am unable to help my son at home as he refuses to try to write and comes out of school needing to de stress but luckily he finds immersing himself in books relaxing. By the way my friend had mentioned about the teeth theory and my son still has all his baby teeth whereas all his friends have started to lose theirs.
The only services we have here in the UK are those you pay for unless your child is far behind everyone (rather than far behind their IQ) as far as I understand it. Not sure if we have all the professionals you have mentioned but my sons school dont think he needs any help.