Yes, found that one. I can picture it as clear as anything. I notice that there are 14 lost episodes, so maybe it's one of them. Or maybe I'm just going mad!
I remember coming home one night and switching on OGWT just in time to see Magazine perform "The Light Pours Out Of Me" and "A Song From Under The Floorboards". I was transfixed. Can't seem to find it anywhere though.