I would have said the same as Leadfingers, except - it was A.L. Lloyd saying it. He knew what he was talking about.
Sorry, I have a lot of respect for Bert for his contribution to the Folk revival, but he was very capable of using incorrect terminology[he was probably distracted and overpowered by young female Waterson charisma] who can blame him.
A L Loyd did not always know what he was talking about, especially when his mind was distracted by the Birds and The Bees.