ALL flights from ANY United Kingdom airport are calculated, fuel wise, as if flying from Gatwick !! I don't know why, but it has always been this way, ergo, the farther away from Gatwick that any flight originates, the more expensive that flight is !!
If one could be bothered to actually calculate how many RETURN air miles it is from Aberdeen, or any other "provincial" U.K. airport, to Gatwick, then calculate how much fuel is needed, at Gatwick costings, to cover that distance, included 2 times take off & landings, divided by number of seats, empty or not, the flight cost variant can be somewhat "justified".
Bugger it, I know what I mean, anyway !!