I have no idea how hard it is going to be now, I can imagine the legalities make it quite difficult.
However, I would be looking at it more from a moral view, the EU (or at least major parts of it) is rife with African swine fever, this is a deadly serious threat to the uk,if it gets here, the agricultural sector will be devastated, it could literally wipe the pig industry out, that is no exaggeration.
To give an idea on the proportions of this disease, China alone have lost approximatly 300-350 MILLION pigs in less than a year, they have been trying, unsuccessfully to try and eradicate it.
it is rife in the eu, please give some serious thoughts to risking bringing anything back into the uk.