I'm not that well endowed with knowledge of the House Of Lords, although I probably should be since I'm doing Law in Ireland and it comes up a lot. There's a lot of House Of Lords cases that I have to memorise actually because of judicial precedent. I could find out, but I'm not really bothered. I know a lot of Scottish people, and a lot of them say "Aye".
Scottish say aye?! The idiots don't even know their own language! It's 'och'! Anyway...
A word of affirmation used in many places - most English-speaking government meetings, for example - is 'aye'. But they generally do things by ballot rather than aural voting, so it's really a moot point.