They are paying the price for Edward I’s conquest of Wales and for the Act of Union in 1707. Next stage: the United Kingdom of England and Northern Ireland. I suppose they would keep the Isle of Man too.
Instead, the pleadings of the Continental Congress were ignored and the gnomes in the Exchequer continued to drive Britain's American Policy.
Of course, had things gone better before the War England itself, would be a minor nuisance too ~ but emigration to America would be so much easier eh!