Jamie Oliver makes get ahead gravy that is the best ever gravy in the world on Jamie’s Best Ever Christmas.

The ingredients are: 2 celery sticks, trimmed and roughly chopped, 2 carrots, roughly sliced, 2 onions, quartered, 5 each fresh bay and sage leaves, 4 sprigs of fresh rosemary, 2 star anise, 2 rashers of smoked streaky bacon, 8 chicken wings, 30ml olive oil, 4 tbsp plain flour, 60ml sherry or port (optional) and 2 dessertspoons cranberry sauce.