What if .........Britain

By now, our status would probably be like Canada’s and we’d be independent.

they'd have been stuck in a war of attrition against partisans/militias that they'd lose even greater numbers to, which they'd be forced to abandon and lose anyways...

They did. They are not dependent on Rome, Norway, Germany, France.

Britain actually did win the war of Independence! The Brits have no idea how lucky they are today as a result!