Most of the source singers are now dead although Bob Copper is still going strong fortunately.They were the people who the Current Singers
of traditional songs learned from,who learned the songs within their
family or community environmrment.
Just as a matter of interest how many U K Catters are aware that Bob Arnold who played Tom Forrest in the Archers for many years until HIS demise was a Shropshire source singer.I have a lovely version of Stow Fair(Not Widdecombe) from Bobs singing.