What about the Normans and the Saxons?
Says the cheeky Oz slept-thru-histry lessons Scottish/Irish/Pommie laugh-at-the-snotties jokester... :)
And isn’t it true that the majority of peoples living in ireland when oliver cromwell went through there were in fact brit-twits, and the only “irish” were located in scattered tiny bands of mostly brigands who only later attempted to distinguish themselves from their English ancesters?
(adjusting flame-proof knickers now, lol!)
As to the second, not quite.
But there were a number of English or British people living in Ireland starting at about 300 AD.
Saint Patrick was British.
Try wearing that button on St Patrick's Day!
And that is why the idea of making the "English" leave Ireland is not practical. They have been there for over a thousand years. They are, for all intents, natives.