Chinese Roast Belly (Siu Yuk)

Some of you may have seen this recipe which I posted on the BBC food board ages ago.I bought a big piece of belly from Morrisons (ask the butcher), so it is time I make some of this fattening but very yummy and crispy belly pork.Thin belly slices will not work with this recipe. You need a whole piece of belly pork at least 2 lb (l kg) in weight up to 2 kg. To get the thick and crispy crackling