Sadly there are very few CFOF recordings extant. And John Penhallow explcitly states that two recordings of Sandy Denny came from LFSC acetates in Perth (which we have ccpies of). So the hypothesis is that these two Sandy Denny recordings on LFSC 31 and 36 actually came from CFOF - despite this latter being a folk programme from 1967 well after the LFSC series of 1966. And if the recordings came from CFOF then Sandy could not have appeared on LFSC and indeed never reocrded at C#H as is stated on so many websites.