UNITED KINGDOM ACCREDIATION SERVICE (UKAS).
Accreditation is the formal recognition that an organization is competent to perform specific processes, activities, or tasks (which are detailed in a scope of accreditation) in a reliable credible and accurate manner. The provision of accreditation must:
Accreditation delivers confidence in certificates and conformity statements. It underpins the quality of results by ensuring their traceability, comparability, validity and commutability.
For details https://www.ukas.com/sectors/industrial-manufacturing/