The Topic LP Songs and Southern Breezes (12T317; 1976 or 1967, I think) contained some of those recordings, but has been out of print for some time. Track list is at http://www.mustrad.org.uk/discos/discog.htm. Some are included in Topic's Voice of the People series, and some are available on various folktrax anthologies (presumably by permission).

As for future plans, you would need to ask the BBC about that.