I work from a NHS building, though they are not my employers. It is a private rented industrial estate.
The previous car park company used to clamp, if not in a proper space. Now I have a blue badge, it is illegal to clamp a vehicle displaying a blue badge, so I got a parking ticket, I challenged it and it was cancelled. There are no disabled parking bays, which is also illegal and an ongoing argument. Anyway there is now a new company monitoring parking and they do not clamp, but give a ticket and the sign clearly states that disabled are not exempt. When I can, which is mostly I park in an appropriate bay, but sometimes I can’t, so take a chance, will challenge if I get a ticket. The local council seem to suggest that these tickets are not enforceable, I am happy to test the system, easier with a blue badge, but most people just pay up because the ticket suggests a higher fine if not paid in 14 days.
I only display the blue badge if I cannot park in an official bay.