I do not see the problem with Double Red lines on the approach roads to Liverpool Airport. The road also provides access to an Emergency Rendevouz Point. And like other roads with such parking restrictions there are cameras and sometimes associated fines.
How many airports, with a throughput of over 4 Million passengers, allow unrestricted parking on the approavh roads to the airport terminal? And, moreover, how many airports provide free dropping off time, allbeit for 5 minutes.
I do not see that Liverpool Airport and its owners are wrong here!