M0nica
I pour a bottle of good red wine over my gammon and a few cloves and cook it very sowly in my slow cooker, once even overnight. The result was pulled gammon. Delicious, but not quite what I wanted, so now it is 3 or 4 hours.
I am an offhand slap-dash cook, but I have never had a problem with this way of cooking gammon. I start by bringing the gammon to boiling point in water and then pour water and scum away before pouring over the wine. The stock from the ham is then used to make gravy.
Mine turned into pulled gammon last year, not what I wanted either M0nica.
Often I have par-boiled it, then sliced off the skin, criss-crossed the fat and slathered it in marmalade or a mixture of honey and mustard, wrapped most of it loosely in foil apart from the top and finish it off by roasting it in the oven.
Similar to Witzend.
Sometimes cook it in cider.