That is Lisa Hannigan, an amazing singer and used to sing a ton with him (Damien). I believe this was recorded after they had broken up but were forced to complete the gigs that they accepted before breaking up so she didn't really want to be there.
He doesn’t even know the words or he messed up more likely but it’s peoples favourite cover on these comments 🤣🤣🤣 38 seconds in the lyrics at that point of the song as I know them are , while they’re standing in the welfare lines , crying at the doors of those armies of salvation . he sings, standing on those always of those armies of salvation while mumbling hahahaha , what a mess up that was , but recovered well from it , but being honest about the playing it sounds messy like more of a beginners bashing strings voice is good but is he a pro or something because that’s a poorly played version talking about the playing alone here