A toddler sitting on her mother's shoulders during the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.Inspector Walker of the Metropolitan Police tells one of the organisers that the International Pillow Fight Day can go ahead.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.A worried looking man about to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight DayPeople gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.People gathering in Trafalgar Square to participate in the International Pillow Fight Day.