Hugh F-W has a very helpful DVD called A Pig In A Day With Hugh And Ray - covers everything from selecting a breed to the end product! I have a copy and can recommend it. Andy Case does a good book Starting With Pigs.
As Red says, contact DEFRA for your holding number and herd number well in advance.
I discovered the hard way that two or three strands of electric wire is the
only way to keep them in. These three were happy staying behind a single strand:
They do need to be
trained on electric otherwise they have a tendancy to barge through it.
It's easily moveable if on plastic stakes and easy/quick to erect & dismantle. It can be quite expensive to buy new but will last for years and years.
Once you find a weaner supplier, I bet they will be able to offer direct help. Pig people are generally nice guys (especially the Scots lol).