LONDON (REUTERS).- Britain is bursting with ancient buried treasure and the masses have been bitten by the bug for digging it up — ironically with the full approval of the government and leading museums. Latest figures released by the British Museum on Wednesday showed a “massive” jump in the number of antiquities and spectacular objects classed as treasure being found by ordinary citizens with a passion for history. In 2010, over 90,000 archaeological objects were reported to museums across the country — a 36 percent rise on 2009 — through what is known as the Portable Antiquities Scheme (PAS). The scheme, which experts say is near enough unique to Britain, also allowed 859 separate items of treasure — loosely defined as objects containing gold and silver, or hoards of ancient coins — to be lawfully un-