Here are a number of websites which you may find useful.
British Association for Adoption and Fostering
Cafcass – Putting children first in family courts
Childline – help and advice line for children
Coram Children’s Legal Centre – charity: law and policy affecting children
Day Care Trust – national childcare charity
Family Lives – charity providing help and support in all aspects of family life
Free Fact Sheet: Telling The Children
Helpguide.org – Child Issues Help Guide
Her Majesty’s Courts and Tribunals Service
HM Courts & Tribunals Service – the court guide to making a Children Act application
Legal Aid Eligibility Calculator
MATCH (Mothers Apart From Their Children)
Putting Your Children First – a guide for separating parents