Preheat oven to 240 C.
Heat some oil in a large dish. Sear pork all over in a little olive oil. Remove from dish and add the vinegar. Boil until it starts to reduce, 2 or 3 minutes. Reduce heat and add remaining ingredients, and return the pork to dish. Cover with tinfoil or place a lid over the contents and bake in the oven until cooked. Ensure that the pork is well covered with the juices and baste from time to time.