Panic Panic Panic Panic
Actually, panic is good.
They will discuss and legislate this behind closed doors at the end of a corridor in the room next to the room that houses the cellar boiler, having removed the stairs, all signs and light bulbs.
The paperwork will then materialise as if by magic and our Government, whichever it may be at the time will enforce it with true enthusiasm and real vigor. They will then claim that they cannot but follow the rules because the EU treaty is binding.
Of course, the French will riot against it, the Germans will find it unconstitutional,the East Europeans will love it as it harks back to the days of old and state control, the Italians will ignore it, the Greeks will ask Germany for permission to avoid it and the Dutch will be too stoned to bother. Oh, not forgetting the Spanish, they will use it to stop traffic coming out of Gibraltar.