It's a conundrum, runrig. If the young guys who play while teetering on rocks had given some info about the source of the tune, we could be confident it's traditional.

And if Paul Mounsey had actually composed the piece, then the credits linked by Ed ought to say 'c. Paul Mounsey, 20--'

It does sound traditional, but of course, anybody can write a new piece that sounds traditional. It just depends what mood one's muse is in that day. By the way, the second half of the tune is very familiar - there's a famous tune that ends the same way. I just can't remember the name.

I want to know where the B part is. If it's a traditional tune, it's lost its second half.