“I waited a long time, an hour or two, to make that picture perfect. But I wasn't totally satisfied. Then, when I'd finished the shoot, they were about to leave and they suddenly hugged in front of a radiator. I took my camera and that was the picture that ran everywhere - it was spontaneous emotion you could see they were completely in love.”
Source : "Kate & William’s Engagement Photo Was ‘Spontaneous Emotion,’ Says Photographer" By Rebecca Adams, www.huffingtonpost.com. January 18, 2014.