Put the squeezed orange halves into the slow cooker and add the cinnamon, onions and garlic to cover the base of the slow cooker. Season the beef all over, rub in the cumin and cinnamon and put in the slow cooker. Scatter over the saffron and bay, then pour over the hot stock, soy, vinegar, honey and orange zest and juice. Cover with the lid and cook on high for 4 hrs.

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.