"Rise Up Jock" by John Roberts and Tony Barrand, on their "Nowell Sing We Clear album. It tells the story of a mummers play, born of pagan rites, dramatizing the battle between summer and winter.
"So rise up Jock and sing your song, for the summer's short and the winter's long. Let's all join hands and form a chain, 'til the leaves of springtime bloom again".