The National Youth Advocacy Service (NYAS) is a children's charity that supports and empowers care-experienced children and young people. NYAS offers a variety of services, including: A national advocacy helpline. Advocacy for children in care and those in need – including children subject to child protection plans, care leavers, children and young people with disabilities. The provision of independent visitors for children in care. Legal representation of children in private family law. Advocacy to adults in-inpatient mental health settings.