I don't mind a Trade Body which has interests in a related business, as in the commercial world this is quite common. We have seen what looks like attempts by NCC Ltd to promote itself as some sort of technical authority, to be a vehicle registration body. An insurance company refusing to pay a claim until NCC ownership paperwork is obtained sounds like a monopolistic practice to me. Caravan manufacturers demanding service personnel be NCC registered, when competence does not depend on it sounds like another. Would the Automotive industry get away with this? I could go on.