I'm surprised that this show started in 1970, thankfully I am not old enough to remember episodes from that long ago, my memories are circa 1983. It was a show that I enjoyed quite a lot and always looked forward to. It was set in a (fake) market as I remember and Cosmo and Dibs hung around the fruit and veg stall, I'm not certain if they owned this stall or not. They would be taught things by a human friend that they encountered like counting or the alphabet. Cosmo had a Geordie accent and sounded like a heavy smoker although she/it never had the accompanying cough. Dibs had a London accent and was apparently a male version of whatever they were. In fact it is hard to say, they looked a bit like monkeys but I don't remember it ever being clear. The only other parts of the show I can remember are that they would do an outside bit that Cosmo and Dibs didn't take part in. I remember one where Michael Rosen took his son to see Arsenal play, I can't remember if they won or not as that was by the by. Anyway I have good if hazy memories of this show.