There was a shop in Crieff that sold secondary market cut glass - but it was always just traditional stuff, there hardly ever was anything of interest. I did spend some time studying an oval shaped vase with a frog like the first one you showed, with the bites out of the edges. It was sort of interesting, but not something I'd have paid £15 for, or given house room.
I'm sure I've seen things like the images from Kew you posted, in the back room of Oxfam. I didn't know what they were - I think I suspected something to do with a toothbrush holder. I honestly cannot remember if I priced and sold them, or if I binned them. There was a minimum price policy, so if it wasn't going to raise 99p it would get binned; and I never put out damaged glass.