Peter, you have certainly hit the nail on the head. The songs you mentioned are seldom if ever heard in folk clubs, either now or in the past, (Going back to the seventies). However, they were heard on BBC radio programmes such as Singing Together, and appeared in piano music, and popular song books and heard from our parents and grandparents. I think there was a general move away from these well known songs in preference to the lesser known songs from the tradition, especially songs collected in England. Just to be clear, I am talking about clubs in the south and west of England. I am sure different rules apply in Scotland, Wales and Ireland.