Umm!
Interesting concept just do not let our Labour government down here find about that idea, we would find ourselves with yet another levy.
Should be quite an attention getter for the cause, think a C17 would grab plenty of attention parked in front of the Palace. The Queen herself might dip into her purse and give a bit of a contribution too.
If the British public knew how little uplift capacity we both have then there would be more concern I am sure displayed by them.
Down here the press gave our ability a hammering with the situation in Timour when we had to hire from overseas more capacity.
I believe that at the end of WW2 the then USAAF had a large display of aircraft at the base of the tower, but I do not know if the flew them in or came by truck.
Regards
Col