Bertlloyd and EwanMaccoll,were both members of the communist party.
J S Manifold was a communist,and according to the programme [if I heard correctly],so was Meredith,Ian Turner,and others involved in the 1950s collecting of australian folk /bush /traditional songs,and early Australian folk revival.
however, both LLoyd and Manifold tampered with the tradition[in my opinion with varying success]yet neither were working class.
The input[to the folk revival,and also The recording and collecting both in England and Australia] by many people who were in the communist party or left wing is undeniable and should be recognised,we owe them a debt.Dick Miles