When buying pork from your local butcher or an online shop/farm/producer it's better to stick to the traditional British breeds. Not only will the pork, in general, taste better, but also standards for the rearing and welfare of British pork is higher than many countries abroad including the EU.
Gammon is pork leg cured in brine and salt. Gammon is a very versatile joint of pork that can eat hot, cold, with a salad, or is delicious in sandwiches!