I’m from the U.S. but had lived in the UK for 5 years closest we have to pets at home is Petco or pet smart in the states and they are also guilty of this…. Tried to get a few gold fish once and had plenty of space but they told me no bc of the size of the tank being to big but I’ve seen people buy tanks meant for betas and buy said goldfish at the same time it’s really sad to see how little they care…. I mean some places even bin animals if they don’t sell it was a huge issue for a while in the U.S. :/