Issue first raised Heathrow Post #135 on 30.3.21...Slipped in unnoticed as a "UK Exceptional Regulatory Charge" but only applying to LHR!
Behind the deliberately misleading wording effectively you are paying to maintain staff car parking/check in desks & fixed facilities & functions the very wealthy owners of the airport should of course be providing & funding themselves.
The reality of this additional privilege to use LHR will only now become evident as travel begins to reopen slowly...Enjoy.