Bruce Thornton, Development and Training in Children’s Social Care. Co-author with Dafydd Paul of the Risk Model© to provide social workers and other child protection workers with tools, techniques and skills to assess the risk of significant harm. Bruce Thornton, Development and Training in Children’s Social Care. Co-author with Dafydd Paul of the Risk Model© to provide social workers and other child protection workers with tools, techniques and skills to assess the risk of significant harm.