Heat half the oil in a large casserole over a medium-high heat, and fry the diced pork for 5 mins, stirring often until browned. Transfer to a bowl using a slotted spoon and set aside. Squeeze the sausagemeat from the skins into the pan, and fry for 2-3 mins until browned. Scoop into the bowl with the diced pork.

Reduce the heat to low and fry the onion, carrot and celery for 5 mins in the remaining oil. Add the garlic, fennel seeds and chilli flakes and fry for 1 min more. Return the meat to the pan along with the wine. Bring to a simmer and cook until the liquid has reduced by about half. Add the bay, rosemary, thyme, stock, tomato purée and chopped tomatoes, and return to a simmer. Season. Cover and cook over a low heat for 2 hrs 30 mins, or until the pork is falling apart.

Remove the lid, discard the bay and turn up the heat slightly. Simmer for 5-10 mins, or until slightly reduced, stirring often. Stir in the cream, lemon zest and parsley. Season to taste.

Cook the pasta following pack instructions. Toss with the ragu, and serve sprinkled with parmesan.