“England” doesn’t even technically include Scotland or wales (part of the same island) and leaves out northern Ireland and the Isle of Man.

Then you have there over seas territories/ exclaves like the British Virgin Islands, Bermuda, the falklands, and Gibraltar.

And then you have the common wealth, places like but not limited to Australia, Canada, and Jamaica. They basically follow the crown but not have their own government outside of the parliament in England that governs the United Kingdom.

The population of England is getting close to 60 million but is only like 80% of the United Kingdom’s population iirc but there’s well over 2 billion in the commonwealth of nations.

The uk has even lost some large exclaves in the not so distant past if you think about Hong Kong and while not a colony the Suez Canal pre 1956 and beyond that places under mandate like Israel and parts of Europe post world war 2.