Remove the lid and stir in the sugar and cranberries. Cook for a further 2-3 hrs on high, covered, until the beef is tender. Transfer the beef to a plate, then using two forks, shred apart, removing any fatty bits. Meanwhile, pour the liquid into a wide pan and place over a high heat. Simmer for 15-20 mins until reduced by a third, then season to taste. Remove the cinnamon sticks and bay leaves and discard. The oranges should have broken down into little pieces, but you can remove if you prefer. Pour the sauce over the beef and toss together. Serve on a platter sprinkled with the chopped parsley. Serve with jacket potatoes, rice or couscous.