I have no doubt that in-depth studies have taken place to establish what is the maximum fee that can be charged without affecting the total number of cars visiting the drop off area. Luton though is in the unfortunate position that to allow a maximum flow rate through a restricted mid term car park entrance and exit it can’t stop cars at barriers to inflict a charge.
I am sure that it is being looked at now to see if there is a way to modify the entrance and exit to increase the number of lanes so charges can be reintroduced. The old drop off area had 2 lanes in and I think 8 lanes out.
This is the temporary drop off that has been refined over the last few weeks but is still a nightmare if being picked up.