[Maddy Prior, Rick Kemp]
Maddy Prior sings Bewcastle on her and Rick Kemp's 1990 duo album, Happy Families, and it ends with an instrumental version of this song. A single mix of it was included in 1991 oh the Hokey Pokey charity compilation All Through the Year and in 1995 on the Maddy Prior compilation Memento. As far as I know, it has never beeen actually released as a single.
Sorry, I can't show the lyrics here as I don't have the copyright owners' permission to publish them. But please feel free and ask me to send you the song's lyrics.