[New York] Two U.S. agencies were the big winners at this week's London International Advertising Awards. Havas' Arnold Worldwide, Boston, won the Grand Prize for TV and cinema with Volkswagen of America spots "Bubble Boy," "Squares" and "Chain Reaction." Arnold's American Legacy Foundation spot "Positive" picked up the Grand Prize for radio. Crispin Porter & Bogusky, Miami, took home the Grand Prize for Outdoor for Mini car ads. No Grand Prize was given in print, but Crispin Porter won top print category prizes for three clients: Mini cars, Ikea and Giro.