Thanks so much for the quick reply Andy, very helpful indeed - it is indeed an Aussie set, I live in Melbourne, I imagined that these things would be more standard internationally but perhaps not then. It could explain why it’s unfamiliar to me then, I am English and used to have sets back in the 80s but I didn’t recognise any of this. I can try those methods but wondered if there are any Antipodean forum members who have come across this set up before?