Around the time I heard 'Isipingo' on that show it was broadcast in the impossible time of 12:00-12:30 on Sunday evenings as the 'BBC Jazz Club' segment in 'Sounds of Jazz'. Peter Clayton was the amiable and knowledgeable host (very much missed on UK airwaves, along with Charles Fox). I can recall loads of great stuff on this show - Ronnie Ross groups, Kenny Wheeler Big Band, Turning Point, Keith Tippett, Norma Winstone, Mike Osborne, In Cahoots - the list is endless. Sadly, I didn't record any of it.