Is it possible that the welsh singing and musical tradtions have been affected by the competitive Eisteddfods.
Phil Tanner one of the most Respected tradtional singers from Wales came from the Gower peninsula, His songs were all in the English language,
"Wales has a strong and distinctive link with music. Singing is a significant part of Welsh national identity, and the country is traditionally referred to as "the land of song". This is a modern stereotype based on 19th century conceptions of Nonconformist choral music and 20th century male voice choirs, Eisteddfodau and arena singing, such as sporting events, but Wales has a history of music that has been used as a primary form of communication.

Historically, Wales has been associated with folk music, choral performance, religious music and brass bands."
Other than Phil Tanner i cannot think of any TRADTIONAL singers, please correct me if i am wrong, this does seem strange ,was it that folk song collectors did not bother to go to Wales , we know that Sharp travelling by bicycle was restricted geographically and financially.