UK pump price is for petrol with taxes paid. Military fuel is not petrol and is tax free (one of the moans of the trains over planes lobby is the duty-free aspect of Avtur).
Did the bearded one consider the cost of over 30 Harrier sorties, all dedicated to dive bombing Stanley, in daylight, from sufficient height to achieve cratering?
I wonder how many 1000lb bombs the magazines on the carriers carried?
Thirty tons is 'not a lot' but is a significant user of space.