The 2nd chapter in Ord's thesis is about the Radio Ballads. He looks at them as an example of revivalist practice and discusses how tape editing was used to 'contruct working class culture' (by which I think he means present, or present an image of).

Then he discusses Topic Records. And he goes on to Pentangle. I liked Pentangle.

Ord uses the term 'mediation' several times, but does not refer to Adorno. He cites somebody called 'Georgina Born' on musical mediation.
He does refer to Dave Harker, but also, and more often, to Ben Harker, including his work on theatre and on communists on radio.

He discussed the revival with many of those involved, including Bill Leader. It is an academic piece but interesting.