I've also sent a message to Fernhill via their website. I doubt very much they'll get back to a random nosy member of the public, but it's worth trying.

From the rest of the song I can pick out words, but rarely phrases, and unfortunately the phrases I can pick out are so generic as to be fairly useless.

"Rhown i roddion..."

"...rhwng y glaswellt..."

"...priodi cyn penwythnos...