The only other thing you need to do apart from discover the CPH holding number (CPH stands for county,parish, holding) before the piggies arive is to ring Animal Health at the council to get a herd number for them (UK then 6 digits, this is what goes on ear tags etc).
Also work out which local vet you are planning to use, AH may ask you that. AH will then send you a herd register book and also send out animal health info updates etc for pigs now and then, and may inspect periodically (prob fairly soon to start with and then if you are OK they tend to leave you alone for a while).