I still can't hear the supposed resemblance between "Bloody Fields of Flanders" and "Busk, Busk Bonny Lassie", and I tend to be more of a classificatory "lumper" than most.

BTW there are a few differences between TBFoF and the tune of "Freedom Come-All-Ye" - the original is quite a bit harder to sing.

And TBFoF is by John MacLellan of Dunoon, not MacLennan (I assume "oggie" is thinking of GS). MacLellan's best-known composition is the march tune known by many titles before it was adapted to become "The Road to the Isles".