There was a post a few days ago saying that shop has listed apple snails as being available again. I have just found an article confirming that importing and spreading of apple snails is now legal again in all the UK except Northern Ireland (because it has a border with an EU country) The reason appears to be that Defra has decided to deregulate a number of plant pests that are not deemed to be a risk to plants in the UK.
I must confess to being very surprised that any government could act so quickly
Apple snails can return to GB aquariums after restriction lifts - OATA - The Ornamental Aquatic Trade Association
Apple snails can again be imported and sold in England, Scotland and Wales (but not Northern Ireland) after the genus Pomacea was removed from the list of quarantined pests in legislation passed in January. Apple snails have been prevented from sale in the UK since the EU stopped their movement...
ornamentalfish.org
I must confess to being very surprised that any government could act so quickly