Another band worth mentioning and well worth seeing are the Amigos from Swansea led by Gary Phillips who is a wonderful guitarist.The band play as a basic three piece but on occasions expand to a 5 piece with an accordianist and a fiddle player [Billy Jenkins?].
They play everything from ragtime to hot club gypsy ,from delta blues to folk traditional, early 50s style rocknroll to 30s style jazz.
Again they don't seem to be well known outside South Wales but deserve a wider audience.Folk festival organisers should investigate further!