Nice one Cameloge, that Ken Garner book is the bible of BBC sessions.
I checked with sources at the BBC archives and they no longer have the Camel session recordings. Which means either they were lost or (more likely) erased. I'm continually on the lookout for these, especially the Bob Harris session from which I've never seen or heard of any recording.
But I guess this discussion is "off topic" as we're investigating official releases.
I copied the posts above from the original "Officially released live recordings" thread, which will be removed one of these days, in favour of the new Guide to offical live recordings. But I thought we'd better keep these posts as I think they contain quite valuable information.
Couple of notes while it is on my mind: 1) I wrote to Bob Harris via his website to ask about the session, but no reply. 2) The two cuts of the John Peel session on the traders tape sound a lot like the album versions. I think the Peel sessions were always created in the BBC studios but I must get around to a proper comparison just to make sure.