One species of apple snail, Pomacea insularum, was found in a river in Spain several years ago, so because the EU operates a one size fits all policy, all species of Pomacea snails were banned throughout the EU including countries that are too cold for them to survive.
They were also going to ban the import of aquarium plants from countries where the plants were likely to have eggs or baby snails on them, but in the end settled for only allowing imports from these countries provided the plants were treated with snail killing chemicals. For this reason, those of us who want to keep snails of other species and shrimps have to be very careful about buying plants. Only those grown in the EU, and in vitro plants are safe for shrimps and snails. If the plants come from outside the EU they could wipe out a tank of shrimps.