not that they ever use it????

clearly you pay no attention to anything that is actually welsh, like the football team and the rugby team, they sing the welsh anthem. So think you will find it is used almost as much as God save the queen dave

http://www.youtube.com/watch?v=6wRRY8eDMSY

or this year if you prefer

http://www.youtube.com/watch?v=9MVucMaJv8Q