Psychiatric services for children and adolescents with learning disabilities have been subject to fashion and aspiration rather than pragmatic planning, at different times being claimed by different specialties. As services have atrophied, it has become clear how distinct are the clinical issues that arise in this group; issues that show developmental psychiatry at its starkest with a combination of organic, dynamic and systemic factors that require community teamwork. As services and specialties regroup, this evolving area is likely to continue defining itself, perhaps taking in adults with developmental disorders, to emerge as a new specialty, developmental psychiatry. It remains to be seen where this will sit within the health service.