That's really a British note, since it is from Northern Ireland. But it is a bit Irish. The Eire £20s have to be pretty rare, that was a lot of money not to spend in the 1970s.
Thank you for the compliment. The British Note that was made for Ireland is different. I had seen them briefly at a show, but they actually are quite nice. This is another Irish note I have its a little different than the other two