Shared custody describes arrangements where separated parents both play an active, ongoing role in the day‑to‑day care and decision‑making for their child, typically involving the child spending substantial, though not necessarily equal, time with each parent. In England and Wales and Northern Ireland, the term is not a formal statutory label; courts instead make “child arrangements orders” (residence/contact) determining where a child lives and with whom they spend time. In Scotland, the equivalent is “residence” and “contact” orders under parental responsibilities and rights. In Ireland, the concept arises through “guardianship”, “custody” and “access” orders. “Shared custody” is therefore a descriptive term used by practitioners and clients to refer to shared care or joint residence-type arrangements, rather than a distinct legal status. It may coexist with joint parental responsibility/guardianship, but equal legal responsibility does not automatically mean shared physical care. Key issues for family lawyers include the child’s welfare as the paramount consideration, practicality of a shared-care schedule, parental co‑operation, proximity of households, and impact on schooling and stability. The expression is used broadly consistently across the UK and Ireland, though underlying orders and terminology vary by jurisdiction.