There's a third tune for this that hasn't been mentioned so far (unless my skim back through the thread was overly superficial). I have it on an LP of The High Level Ranters, "Northumberland Forever". It's a bouncy, jolly tune which the group give a big, full sound. Quite different from both the Young Tradition and the Carthy melodies (and I seem to recall having the latter tune on an LP by A.L. Lloyd, to corroborate whoever mentioned it earlier).