There is no reliable, official success rate for child custody solicitors, because each case depends on the evidence, the child’s welfare and the arrangements the court considers appropriate. In England and Wales, these disputes are usually called child arrangements cases, and the court’s decision is based on the child’s best interests rather than a solicitor’s past results alone. Ask a solicitor regulated by the SRA about their relevant experience, likely costs, risks and possible alternatives such as mediation. They should explain that no particular outcome can be guaranteed.