BTW, I'm not suggesting Ireland could colonise it, as it was not centralised and was in fact very divided itself. Indeed, there's an old saying if you ever see an Irish man being roasted on a spit, you can be guaranteed there will be 2 Irish men turning it.
I cannot imagine Britain being under a colonial yoke for very long, but it could have vast implications for the spread of the language, scientific and engineering discoveries and developments and the industrial revolution and of course subsequent wars!