I don't think the Beeb has reasons, Bernard; after 25 years in IT I have seen the syndrome of "ask for the info just in case" too many times to trust them. It is certain that PRS don't require it, they don't have the info to match it with. As for Radio Britfolk, it is currently playing my "Miracle of Life" with no label and catalog number (quite right, as it is not on any album or published yet - yet it is PRS-registered).

You and me as bookends, eh? 24 strings and a lot of girth!