Paul McCartney and Heather Mills appeared in London's High Court today for a preliminary hearing in their divorce case. Former Beatle whistled and snapped his fingers as he left the building, and then flashed a peace sign to photographers. Is this a big hint as to how it's going for Heather? She left the courts looking glum, but then gave a hint of a smile as she drove off. Perhaps she thought Paul's peace sign was for her? The former model, 38, and the 64-year-old musician separated last May after four years of marriage and began divorce proceedings in July. They have a 3-year-old daughter, Beatrice. Pictures by and Simon Earl