She was attractive, successful and, at the age of 37, about to marry the man she loved. Then, with a single bullet to the head, on her own doorstep, and in broad daylight, she became Britain's most famous murder victim. The national shock that followed was a measure not only of the cruelty of the crime but also of her remarkable popularity. After ten years in national television, the woman who insisted her secret weapon was her ordinariness had created something extraordinary. The BBC's golden girl was also the girl next door -familiar, trusted and liked by millions. Her murder remains unsolved and also scarcely believable.