Re: "these recordings for BBC Sound Archive" - and likely will stay in the dusty arches for all time. At least Cultural Equity uploaded their recordings to their website.
Meanwhile the Beeb sits on their archives restricting all and sundry to have access. A few years' ago they did have a multi-million pound i.t. project to put all of their archives online, but the project was a complete failure. Meanwhile they are still wiping and junking programmes, especially regional folk progrmmes.