a prototypical folk revivalist?doesnt sound like burl ives, or bert lloyd
my guess is Edwin Thomas,even though i havent heard him sing it is not george Spicer, who i have heard.
a version of the song was recorded from Edwin Thomas, by Peter Kennedy for midsummer morning BBC, 1952.
if it was an actor singing it I very much doubt he would have put on a home counties or london accent,neither would a prototypical folk revivalist, this sounds like a traditional singer.