I once bought a package of digestives that mentioned England, Great Britain, and the United Kingdom on the packaging. I had thought that keeping straight what

I once bought a package of digestives that mentioned England, Great Britain, and the United Kingdom on the packaging. I had thought that keeping straight what each one meant was difficult for Americans and natural for anyone from the British Isles, but that packaging change my mind, because they seemed to be used interchangeably. Sure, if they were made in England than they were made on the isle of Great Britain and within the United Kingdom, but those terms are increasingly less specific, so why use them for something purely English? Anyway, this has me wondering what people meant when they entered "English". Were their ancestors from England itself, from elsewhere in the United Kingdom, or even from elsewhere in the British Isles? (Would people whose ancestors immigrated from the Isle of Man call themselves English?) A large chunk of my ancestors were Scotch Irish, but they would sometimes call themselves English, because England had conquered all of Ireland at the time that my ancestors left. Scotch Irish ancestry is common enough in America that it's probably the only racial group that mocking is considered more classist than racist. (e.g. stereotypical rednecks and hillbillies are used to portray low-class American characters, not an ethnic group, despite it being an ethnic group) If everyone from a British nation that has been conquered by England considered themselves English, it's by far the largest ethnic group in America, but if each original nation from within the British Isles considered themselves separate from England, none of them would be near as big as other European countries like Germany, Italy, and Norway.