Preheat the oven to 180°C. Place the ham in a small baking dish. Combine the brown sugar, apple juice, jam, and a pinch each of mixed spice and cinnamon, in a medium bowl.
Brush the ham with the glaze and bake for 30 minutes, brushing the ham with the glaze regularly until golden brown. Test the ham by piercing with a skewer in the thickest part; the juices should be hot.
Rest the ham for 15 minutes in a warm place to allow the juices to settle and to make it easier to carve.