This site gives lots of useful information about speech and language difficulties.
The Childrens' Communications Charity
Providing information and resources to support children with speech & language and communication needs.
National Literacy Trust
An independent charity working with schools and communities to give children the literacy skills to succeed in life.
The Health & Care Professions Council
This gives a full list of registeresd health care professionals.
Royal College of Speech and Language Therapists
Provides up to date research in the field of Speech and Language Therapy.