Add all the slow cooked rib ingredients to a large pan (not the glaze ingredients). Bring to the boil, then place a lid on, turn down the heat (to prevent the rib meat sticking to the bottom of the pan and burning) and simmer for 3 1/2 hours. Check a couple of times during the last hour of cooking, and top up with a little more water if required. Alternatively, you can do this in your crockpot - cooking for 4-5 hours on medium or 6-7 hours on low.
Turn off the heat and drain the pork (save the liquid for a tasty Chinese soup base).
Heat up the BBQ.
Mix together the glaze ingredients and place in a pan. Boil for 2-3 minutes to reduce slightly, then turn off the heat.
Brush the glaze on to the ribs, then place on the BBQ (be careful, the meat will want to fall off the bone at this point).
Barbecue for 5-10 minutes each side, brushing with more of the glaze until it's all used up and the ribs are sticky and golden.
Place the ribs onto a large plate and slice into individual pieces before serving.