When sourcing a calibration services laboratory, it is imperitive you look for the UKAS and also an ISO/IEC 17025:2005 accreditation. UKAS is recognised by Government as the national body responsible for assessing and accrediting the competence of organisations in the fields of calibration, testing, inspection and certification of systems and the ISO/IEC 17025:2005 is the internationally recognised standard for the competence of testing and calibration laboratories.
calibrate what?