William and Kate Middleton's 'stolen' moments of affection

Each time they make a joint appearance, the Prince and Princess of Wales are poised, present, and completely focused on their duty.However, Prince William and Catherine, both 43, have been known to share romantic moments, when they can sneak them, away from the glare of the cameras.Royal biographer Gyles Brandreth called them 'fleeting signals of mutual support' when he watched the then-Duke and Duchess of Cambridge during a royal outing in 2012.Writing in Prince Philip's biography, Mr Brandreth noted that William and Catherine's attention was 'always on the people immediately in front of them'.'Not once did either of them play to the camera - or even acknowledge them,' he continued. Royal fans have also picked up on these signals, which add another layer to their fairytale romance that began 23 years ago.