He was indeed K9, apart from one season (season 18?), reprising the role in the 5 doctors and K9 and company, as it seems he will be again. But he wasn't Zen, Slave or Orac - they were all done by Peter Tuddenham, IIRC.
Had no idea he was Bungle though! The things you learn here on GG&J
PS sorry for hijacking this thread folks - I'll go back in my hole now
Rob.