Hiya,
The first thing to check is that you've got your CPH number ?
Once your pigs arrive, send a copy of the movement licence to your local trading standards and contact your nearest Animal health office to get your herd number allocated. This is the number that will need to go on the pigs when they go to slaughter, they don't need to be tagged, they can be slapmarked instead, but it's probably cheaper to tag (especially if someone close to you has tag applicators you can borrow) You'll need to order the tags yourself - there are many companies who sell them, supplies for smallholders sell them in lower quantities than some. It's best to fit the metal tags (many abattoirs won't take the plastic ones, but check with your local one to be certain) just the day before they go otherwise they can get ripped back out again.
HTH
Karen