A British newspaper alleged that intelligence services filmed Princess Diana having sex with a cavalry officer. The News of the World said army surveillance expert Glyn Jones claimed he filmed Diana and Maj. James Hewitt making love in the garden of Hewitt's home in western England. A book about the couple's alleged five-year affair was published Monday. Buckingham Palace declined to comment. The News of the World also said that, in a book out next month, Prince Charles would portray his father Prince Philip as a cold, domineering man who made his childhood a misery.