This is a very useful concoction if you are expecting a lot of people for dinner. It looks and tastes splendid, but the great thing is you can prepare it the day before, then just bung it in the oven when required.
Soak the gammon for 12 hours, changing the water a few times. Place in a snug saucepan and cover completely with cold water. Bring slowly to simmering point and cook at a bare tremble for half an hour to each 450g/1