After Said took over? I think.
There seems to be a time when good quality and interesting complicated, stuff was still being made, while Boffo and Dobson were still there, but a bit after that, it all seems to be smallish splodgy stuff, with a lot of white and pink around. These Fish belong to this later small splodgy things category, but are possibly the most complicated things done then.
I'm not really interested in this sort of time period, I'm afraid.