Jamie's Christmas suckling pig

INGREDIENTS

• 1 higher-welfare suckling pig, approximately 7kg (or a neck end, approximately 4.5kg)
• 1 old-English Christmas rub recipe
• 1 clementine
• 3 red onions, peeled and quartered
• a few stalks celery, trimmed and chopped into chunks
• 3 carrots, scrubbed and chopped into chunks
• 340 g good-quality marmalade
• freshly ground black pepper
• 2 tablespoons plain flour
• 200 ml port or red wine
• 1 litre water or organic chicken stock