I just found 2 episodes on YouTube (recent uploads by mangelhausen). Ep "Roadside Assistance" and "Sunday in Suburbia" (pictured). Lots of sports in latter one (golfing, tennis, etc). Previously I haven't found any pics or clips. Director Tim Moores. Editor (WDR) Lothar Humburg. At least 1977 and not 1978. And just 3 episodes. No kids shown. Actors Louise Hall-Taylor, David Gretton.
Main post with new pic of ep 1 Roadside Assistance
https://schulfernsehenenglischhistory.blogspot.com/2021/07/living-in-great-britain.html