I can find the index record Dick, but as far as I can see no contents are listed (although contents are listed for SA 30/1/27/1, with 4 songs by Cliff Yeldham).

The Roud index has several other entries for Chris Yeldham and Harry Green, but Steve Roud must either not be aware of the tapes or not have indexed them yet. (I imagine keeping track of material must be quite hard these days!).