There was a fabulous reunion recently of the choir "boys" in honour of Yigal Calek. See if you can watch this without getting moist-eyed! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-JUYF9cra2Vs.html
they sung a great song arranged in honor of the experience there in Russia. I loved it as a child, thank you for this other piece of the puzzle for me... edit: I think the name of the song was the forgotten princess
This was a live edition of Blue Peter broadcast on Monday 10th April 1989. It began with an item on baby badgers (which I suspect was the item where Yvette was infamously bitten by a badger), then there was a Save The Children and Princess Anne trailer, followed by a film with Yvette and gardener Chris Crowder at the Lancaster Flower Festival, then a garden shoot (probably shot that morning) with Sue Elkins where the pond was cleaned up, then a film of Caron trying Uphill Skiing, then finally the London School of Jewish Song seen here.
