Remove the pork from the fridge 30 minutes before cooking and pat dry with kitchen paper.
Score the pork, making long cuts about 1 centimetre apart.
Place the pork in a deep sided roasting dish and rub the salt into the skin and into the cuts.
Preheat the oven to 150 C / 300 F / 130 FAN / Gas 2 and cook the pork for two and a half hours.
Increase the temperature to 220 C / 425 F / 200 FAN / Gas 7 and cook for a further 30 minutes to crisp the crackling.
Transfer the pork to a plate and use a sharp knife to remove the crackling. Break into pieces and set aside for serving with the pork belly bites.
Cut the pork into 32 pieces and place on a baking sheet.
Mix the honey and mustard together and then the oil and cajun. Use a pastry brush to coat 8 pieces in each flavour of hoisin, honey mustard, cajun and sweet chilli.
Reduce the heat to 200 C / 400 F / 180 FAN / Gas 6 and cook for 15 minutes.
Serve hot from the oven with the crackling on the side.
Notes
The calorie count assumes that all the fat on the belly pork is eaten.However, in reality, most of the fat is rendered down and not eaten.