That is really nonsense... Britain has been able to stand on it's own feet well before the USA came into existence.
We still have the common wealth and we have been able to cope before and after the EU. When it comes to GB we can stand alone and do not need the EU. Even the Queen before the referendum would ask her dinner guests and friends to give two good reasons why we need to remain in the EU. Yours never came up as a reason because Britain has good relations with other Countries and we would soon be back to standing on our own two feet instead of being milked by the EU.
The EU is the ones who will have the problems because those poorer countries who found it too expensive which we all had to pay billions to bail out will seriously think of leaving too.
We do not need the EU...
Just about all the Brexiteers I know present a picture rather like the one you do: based firmly in the past and totally disregarding the fact that the future will be different. Apart from anything else the majority of the the people who voted for leave will not be around to "enjoy" the fruits of their action - they will be dead, leaving the people who did want to remain to clear up the catastrophic mess the produced.
Forget the Commonwealth - it no longer exists in the form that you appear to imagine. Australia and New Zealand may have a lingering ... err .... fondness for the "mother country" but it is nothing more that that. Why on earth should they divert their profitable and well establish trade in foodstuff with the likes of Japan - for nothing more than sentiment? The Jewel of the Empire, India, already controls one of the few remnants of the UK motor industry. For how much longer will JLR remain in the West Midlands when there is a plant being developed in Slovakia?
As for Britain (well, it will probably be just England - Scotland will have become independent and joined the EU and the island of Ireland will contain a single, unified nation) there was once, only a few hundred years ago, a time when England was a European offshore runt. The most powerful country, a great seafaring nation, was Portugal - how things change ...
And as far as your revelations about Buckingham Palace are concerned ... I hope that illegal substances are not responsible for your fantasies.