I don't doubt there is some Viking blood in Ireland. The parts of Scotland with Viking blood are the Orkneys/Shetlands/Hebrides. I think mainland Scotland doesn't have much. They had much larger bases in Ireland than the Scottish mainland.
https://upload.wikimedia.org/wikiped...les-en.svg.png
What Scotland would have more of is Anglo-Saxon input but so would Wales. I'm not so sure about actual Celtic input in the Isles. There was some of course but I'm now actually thinking that France, Spain etc are in fact more Celtic genetically. I think that is quite possible. Irish, Scots, Welsh etc cluster too much with the English, Dutch, Scandinavians etc. This is due to similarity in the Bronze Age IMO.