Stich1: You were on the right station.
I have my Roberts R200 on top of a cupboard & I heard The Yardbirds too. I sent Caroline a reception report of their test transmission.
A pity they couldn't turn up the wick a bit, but not bad for one kilowatt to get to Yorkshire. Strangely the ferrite rod of the Roberts is aligned approx East-West
I could just get it on a Inscol TR 661. Just the sort of little pocket radio boys might have illicitly listed to the station on.
Inscol TR 661:
https://www.radiomuseum.org/r/unknow..._661tr_66.html