Do you really think there would be a war? Consider for a moment the outcome, consider who would enlist? the only war that might happen is a trade war which would see the UK well and truly screwed, we have to import fuel, food, labour, etc etc etc.
After bailing the banks out hence we are in so much debt that it could not ever happen?
What happened to America when they had a problem with Vietnam over a tooth brush
and amongst other items.
Trade war well if that puts us in the shite so the above will happen has a last resort.
Fuel,food,labour well we would simply need to invest then you will not need the above
from anyone else.
If we invest for long term you would not need to worry for the above.
And if we need to buy we would look at America and Australia for such items