A survey conducted by SPS Consultancy Services in 2012 regarding the use of ProClass by local authorities in England showed the following:
It has become the de facto procurement classification for all English local government, used within their IT systems to identify and classify their procurement spend. Some organisations also use ProClass as a way of classifying suppliers in their contracts register. It is now widely used by public organisations.
'Coding and Classification: Maximising Returns from Purchasing Data'
HM Treasury Operational Efficiency Programme (OEP) Report
ProClass is trademarked to the Corporation of London. It is available free of charge to any organisation.