The National Specialist Family Service provides substance abuse treatment to parents who want to keep their children. It has an 80% graduation rate for parents becoming clean and families staying together, and a 70% success rate after 4 years. While the program costs over £2 million for 40 families over 5 years, it saves over £8 million over the same period due to preventing costs of family breakdown. The program is effective but underutilized due to safety concerns of social workers and legal barriers that previously did not allow enough time for rehabilitation attempts before removing children from parents. However, the program helped change legislation to require rehabilitation be attempted before court proceedings.