The key worker is responsible for making sure that the outline child protection plan is developed into a more detailed inter-agency plan. S/he should complete the core assessment of the child and family, securing contributions from core group members and others as necessary. The key worker is also responsible for acting as the lead professional for the inter-agency work with the child and family. S/he should co-ordinate the contribution of family members and other agencies to planning the actions which need to be taken, putting the child protection plan into effect, and reviewing progress against the planned outcomes set out in the plan. It is important that the role of the key worker is fully explained at the initial child protection conference and at the core group.