Colourwork Nordic mittens

I’ve never done colourwork before and I’d like to try Nordic mittens and also Katie’s Kep. What type of yarn do you all use. I think Katie’s Kep requires Jamiesons spindrift and that’s ok. However Nordic mittens specify 2 ply yarn and I’m wondering what you would suggest as I live in Northern Ireland. Also could I use 4ply sock yarn as I have quite a stash of it. Thank you to anyone who takes time to reply

It depends on the pattern gauge. I’ve used the equivalent of sock yarn for these mitts but I also see patterns for DK or sport weight which is close to 4-ply. Nothing feels better than using up that stash, especially now!

Salmon mac you always always answer my questions. You are so knowledgeable. Thank you dear teacher