Sometimes it is not easy prior to actually flying in what the final visit charge is going to be. I am not saying this applies to Norwich but all need to be thought about before visiting a larger airport in the UK.
There can be a Landing charge.
A Handling charge.
A Parking charge. Fixed figure or by the hour.
A Service charge.Can be a percentage total of the other charges.
all this is plus vat.
Any or a total of the above will be the final visit fee.