It was one of those rush laws. They are still for sale, I walk past a "BULK OUTLET FOR ELF-BAR" shop sign when I walk to work.
It's one of those UK laws of "we are doing something!" but not actually do anything. These companies either pay backhand or know how to skirt around the rule. Who's enforcing it?
We're doing about as well at policing the vape ban as we are the ban on cocaine (which, in case you hadn't noticed, is everywhere)