They were specifically informed that this legislation was going to be brought in quickly and that it was likely that people would move these dogs over the border if Scotland didn't do the same.
Scotgov stood up in holyrood and said our current legislation was fine as it was.
Then the dogs flooded over the border.
There is along thread about it here in Scotsnet with lots of articles etc that will be better than my memory.
It's sad that this is still happening but hopefully there is no backyard breeding still happening and that these monstrosities will all be dead in the next few years.