But you have to think. Taking your example there.
A night landing at BHX and what you paid for your service.
Add up what it cost BHX. Fire Cat 8 or whatever they are close to that, probably 8-10 fire fighters, 4 or 5 appliances. Air traffic controllers probably 2 or 3, 1 assistant. Handling agent, night staff 1 bloke to drive the van. Cost of the lights being on, hundreds of lights. Plus the blokes to man the fuel bowser in the middle of the night.
Yes i understand that they might have more than you moving at night but its not alot more. Perhaps they do 20 movements maximum in the late night early hours of the morning if that. Compare that to the cost of staying open for those hours and its 10 to 1 the money you have to pay. It only stacks up because they have such big movements during the day to encompass any loss at night.