Essential Kune Kune links 
British Kune Kune Pig Society website
The starting point for anyone serious about keeping Kune Kunes.
The New Zealand Kune Kune Association
Full of details on Kune Kunes - this is where it all started.
Full of up-to-date information on keeping pigs. You will need to be registered with Defra even with just a couple of pigs.
They will provide you with a County Parish Holding (CPH) number for the land where your pigs will be kept.
Once you have your CPH you can move your pigs to your land. Your local Animal Health Office will register your stock and send you a unique herd mark for your pigs' eartags.
You should have a look at these 5 Freedoms.
An essential tool for all smallholders - try the link.