The same is true of so many:
Bromley's NTOs are defective (payment period from date of notice rather than date of service), Lambeth's moving traffic and bus lane PCNs are all defective (payment period from date of service rather than date of notice), some Westminster moving traffic PCNs (21 day discount period rather than 14), the list goes on.
But really you're preaching to the converted here.
Might help to talk to the local press that covers Bromley, also Bromley facebook groups etc.