Last night I came across (on Youtube)an episode of a program called "Music Room", hosted by John Pearse.

https://youtu.be/GWK_zzrS1xw

It was from 1970 and featured a very young Steeleye Span - line-up: Maddy Prior, Ashley Hutchings, Martin Carthy, Tim Hart, and Peter Knight.
It was an odd program in that Steeleye played a few songs, John Pearse
interviewed them, questioning Tim Hart about his electric dulcimer,
then JP and two others (co-hosts?) moved over to a table where they were building a dulcimer.
It had a sort of an adult Blue Peter-ish feel to it but it was lovely to hear an early Steeleye performance.
Anyway, I wonder if UK Mudcatters are familiar with this program.
There is at least part of another episode featuring Danny Thompson
which I have yet to watch. Are there others out there?