What are we talking about specifically?
Just thinking aloud, what are we talking about? Dropping food off? Bales of hay for shepherds in upland areas? You are talking about roping in entire squadrons and their support staff. Ok down the SW we are top heavy with CU,VLN go on Odiham, Middle Wallop....but elsewhere? SE England etc. There s nothing there to help.
The armed forces now couldn't do it at short notice. The capability isn't really there, or the set up. Training hasn't been made for it (and I mean proper contingencies training for sustained ops, say a 2 month spell of current or worse weather).
Its not the military's problem to sort out anyway.