I'm from the other side of the border, but the "woman" you refer to in the video is Marilyn Tucker of Wren Music. She refers to a "Ballad Opera" and I confirm she says that is it's origin, but that the song was taken up by ordinary people who were singers after this.

The conductor she introduces by the way is Matt Norman the mandolin player and Dartmoor Step dancer, known particularly for his work in Gadarene. The arrangement is by Paul Wilson, also of Wren Music.