From the "aw corro melon ba" I would guess Ca^n y Cardi (I think that's the title) which I refer to as "Cwrw Melyn Bach" - Yellow Small Beer/Ale. I don't get the 'aw thunkanel, aw thunkanel' bit but maybe I would if I dug it up somewhere. It was recorded by Ar Log and it's an interesting song as it is one of the few (possibly only) songs that talks about the life-style shift in a family which moves from the farming in the country into the coal mining industry of the Valleys.

"I'm a great lump of a Cardi (person from Cardiganshire), just come from the country, working as a gaffer in the upper levels, and earning more than my father."

sian