The tradition of the pig roast goes back millennia and is found in many cultures. There are numerous ways to roast pork, including open fire rotisserie style roasting, and "caja china" style box grilling.
In the UK, the tradition of pig roasting, which is also known in the UK as a Hog Roast, is popular on many occasions, particularly parties and celebrations. It is usually an outdoor event, and a staple meal on many show events. The tradition is either to roast on a spit, turning the pig or joint under a flame, or in a large oven in a roasting pan.
The pig is normally roasted in a gas propane machine. The pig's skin is scored with a sharp blade and covered in water and salt to make the 'crackling'. In ancient times going all the way back to the Saxons, roasting a wild boar was often the centerpiece of a meal at Yuletide, with Yule being Freya's fest. The head was often the greatest delicacy, as evidenced by the survival of The Boar's Head Carol.