They are still listed by DEFRA as being fish that require a license.
What appears on lists of fish offered to dealers is neither here nor there. I've seen various supposedly illegal fish and invertebrates in aquarium shops in the recent past. The law really isn't easily enforceable, and depends much more on retailers knowing what is and isn't legal, and then acting accordingly.
Cheers, Neale
Historically, aquarists have not been very good at preventing fish getting into the wild. There are lots of exotic species all over the world that certainly got to those places thanks to the aquarium hobby. Kribensis in Hawaii, oscars in Florida, etc.As demonstrated by zander and signal crayfish, the introduction of non-native species of fish and shellfish can have far-reaching and undesirable ecological consequences... It is therefore vital if we are to protect native species and their habitat and conserve the unique diversity of animal and plant life in our rivers and stillwaters that we restrict the spread of non-native fish species.
why are they illegal?