If Great Again Britain finally wrenches itself loose from the toils of the EU, and is politely asked to withdraw their Governors – General, Lieutenant, State, or Honorary as the case may be – from nations that have finally decided that they can also govern themselves, there will be formalities to be completed.
In the case of the United States these were conducted at Yorktown in Virginia some centuries ago. The representatives of the British Crown under Lord Cornwallis were invited to throw their muskets into a heap and get on board Royal Navy vessels and go away. The alternative was to be shot dead. It may not seem a very formal procedure, but it was effective.
We need not go the musket route here in Australia or New Zealand, though it would be a lot of fun. We can simply pack up the silver, paintings, Rolls Royce cars, and portraits of H.M., place the Governors on top of the pile, and send them back to Tilbury Docks via the next container ship. The various Government Houses can be occupied by the state or federal leaders and if it is done with efficiency no-one will really notice anything.
Canada may have a problem in that they will be replacing a Queen with a Trudeau and there may be a lot of popular sentiment against it. If they substitute a hockey goalie the thing might go well.
I think the UK would do well to look to a hitherto untapped source of funds – the Loyal Oath taken by new citizens of Commonwealth countries during their naturalisation ceremonies. I underwent one such affair in 1970 and it was a solemn and joyous occasion. A Bible was held and an oath of fealty to HM Queen Elizabeth II, her heirs and assigns was taken. This was not given a run-out period and is in force today.
If the British BREXIT from Australia as well as from the EU, I am prepred to pay a fair fee for the cancellation of this oath and/or its transfer to an Australian President or King or High Ruler. If the transaction occurs during the reign of King Charles III, I would be prepared to pay more.