on the superb Heath/Wilson BBC4 programme - The Strawbs.
Whilst they used Union, my favourite is Lay Down.

Is there a law that the BBC has to use sound recordings owned / controlled / licensed by the Universal Music Group whenever they need same background music?

Apart from Changes/Bowie and The Carnival is Over/Seekers (and maybe some of the instrumentals) everything was from the UMG vaults.

And there was definitively too much "mickey mousing" (like in the case of the miners strike & "Part Of The Union") going on.

I didn't get why they played "White Light White Heat" by the Velvet Underground as a comment to something happening in 65/66, two or three years before the song was recorded - and almost a decade before more than a handful of people did know the VU.

At the time (1974), my favourite Strawbs track was "Hero And Heroine".