Hi Sarah
Now you have got your CPH, you'll need to get a herd number for pigs. In Scotland this is from your local authority/council, may be the same in England. You'll also need a flock number for sheep which you get from your local DEFRA office.
In both cases you will need a movement licence for the stock, but this will be provided by the seller when you collect them.
Good luck with them! and remember.........Pigs, very clever.........Sheep, incredibly stupid!
Dave