LONDON Supermodel Naomi Campbell and rocker Mick Jagger were among the attendees at the British Museum 's inaugural fundraising ball on Saturday, a glitzy event touted by some observers as London's answer to New York's Met Gala . The museum, which boasts one of the largest permanent collections on the planet, said the ball would aim to "celebrate London's status as one of the world's leading cultural capitals" and become a new fixture of its social calendar. The theme, less ambitious than the