"The LLanfairllan(whatever)gogoch song heard at Miskin this year"
There are 2. If the singer was Snuffy, then it's the Les Barker one. If it was Pat Spoons, then it's Dewi Davies's Mystery Tour by Jack (The Bard) Sully, who has written many a fine funny song (and he's Welsh). Both hilarious.
Splott Man