Thanks for the link - I can only find regional sites and the suggestion that the main pig area ( Brittany) has more regs. than other departments
Anyway it looks like that I had it right when;
I bought tagged pigs ( the sellers would be obliged to sort out movement papers)
The pigs were for my own use
and I arranged a home kill.
I haven't sold any either - its too good

Just need to research what vaccinations they should have had before I buy them.
Hope the above has cleared things up for others and thanks OhlaLa.