Depending on how salty you like your gammon you may wish to soak it overnight in water to draw off some of the salt. If you can, change the water a couple of times. Soak it in the biggest pan that will fit in the fridge and hold your gammon, covering it with cold water. Leave it in the fridge as it's best kept cold.
Set up you Egg for indirect cooking, ConvEGGtor feet up with the stainless grid on top. Get the temperature to 150°C.
Place you gammon in a baking tray or straight on to the stainless grid.
Cook until the internal temperature of the gammon is 55°C, this will likely take 3 hours or more.
Take your gammon out of the Egg and with a sharp knife remove the skin from your gammon, leaving as much fat on as possible.
Score the fat into 2cm diamonds using a knife.
Sprinkle the gammon fat with english mustard powder and rub in a little.
Push a clove into each of the diamonds of fat.
Drizzle your gammon with maple syrup.
Return it to the Egg and cook until it is 65°C or more, basting occasionally with the maple syrup that will run off.
Serve either hot or cold but do allow it to rest wrapped in foil for at least 1 hour in a cool box.