Preheat the oven to 400F/200C/Gas 6
Mix together the ingredients for the rub and squash to make a powder
Rub the mixture over the duck legs
Place the duck in a roasting tin and add the apple juice
Cook for 20 minutes then baste with the juice.
Turn the oven down to 325F/170C/Gas 3
Cook for another hour to an hour and a half until the meat is soft and can be pulled from the bones.
Leave the duck in the tin to rest and pour the juice into a pan, skimming off the fat.
Add the barbecue sauce ingredients and bring to the boil.
Reduce the heat and simmer for fifteen minutes until thickened.
Pull the duck into shreds using two forks and serve with the sauce.