without seeing your buildings it would only be a guess as to what you could do
it all depends on what you want how much you want to spend and how many pigs you are going to keep also what size they are going to be
concrete is a must unless you have free draining soil and that is in short supply in Scotland
are they still going to have access to outside
there urine is highly corrosive (our metal pens are showing signs of old age after 10 years)
what water courses are near you for run off you will get busted by sepa if urine enters the watercourse
what bedding material are you going to use and how are you going to dispose of this spent bedding
if you contact your planning department it will never get of the ground
block built pens have to be secured to the floor with steel re-bar frustrated pigs or hungry pigs can cause a lot of damage
handling facility's have to be built in as well just to make your life easy
others will come up with more info