United Kingdom Accreditation Service
The United Kingdom Accreditation Service (UKAS) is the sole national accreditation body recognised by the British government to assess the competence of organisations that provide certification, testing, inspection and calibration services. It evaluates these conformity assessment bodies and then accredits them where they are found to meet relevant internationally specified standards.
Source: Wikipedia — United Kingdom Accreditation Service (CC BY-SA 4.0)