Pre-heat the oven to 230°C / 450°F / Gas mark 8. Take a knife and score the skin of the pork in a line between each of the bones. Lightly oil and season with salt and pepper. Place the joint in a roasting tray and cook in the oven for about 15-20 minutes (the skin should start to crisp in that time).
Turn down the oven to 200°C / 180°C Fan / Gas mark 6 and continue to roast for 45 minutes, making sure every so often you coat the pork with some of the oil in the tray. When cooked remove the meat from the oven and allow the pork to rest for about 10 minutes.
To carve the pork, simply carve in between the bones, you could also take off the crackling first breaking it up into pieces to use as part of the garnish.