This article examines the issue of child trafficking in the United Kingdom and of multi-agency responses in tackling it. The United Kingdom, as a signatory to the recent trafficking protocols, is required to implement measures to identify and support potential victims of trafficking—via the National Referral Mechanism. Effective support for child victims is reliant on cooperation between agencies. Our regional case study contends that fragmented agency understandings of protocols and disjointed partnership approaches in service delivery means the trafficking of vulnerable children continues across the region. This article asserts that child trafficking in the United Kingdom, previously viewed as an isolated localized phenomenon, maybe far more widespread, revealing deficiencies in child protection services for vulnerable children.