sINGING winter songs as I walk round freezing Worcester, plus folk and what's this tune?

The #winter #weather and #snow puts me in mind of a couple of seasonal #songs. Also, can anyone tell me what a snatch of tune is, please? It's been bugging me since I heard it on Saturday! I end with a verse of the #irish #folksong, She Moved Through The Fayre. For more of my #vocal boos, please try my FionaDunnSings account, where you'll find more #folk #singing, and other genres of #music.