This evidence and practice briefing aims to support FDAC practitioners and local authority colleagues in decision-making about which families are deemed eligible for and referred to FDAC. To support in achieving consistency across FDAC services and to ensure that referral decisions are evidence-based, this briefing aims to: clarify the FDAC eligibility criteria by summarising the evidence base to date; provide practical guidance for eligibility decisions; provide clinical guidance and support to ensure consistency across FDAC services; and explore how key factors - such as trauma, implicit biases and structural inequalities - may affect referral, initial assessments and practice decisions.