They had a very good folk programme in the '70s/'80s 'Folk Review. Anybody remember Wally Whyton? I listened to it via BFBS in Germany, learning about my new-found hobby. Then it got dropped - folk wasn't 'in' any more ...
Needless to say, we have the same problem in Germany (although just now I'm listening to an hour-long concert by one of Germany's foremost - and oldest - folk groups!).