A sullen Prince Andrew has been spotted on his own after ducking out of the Royal Family 's Christmas celebrations. The Duke of York, 64 was snapped heading out for a lone afternoon walk near Windsor Castle on Sunday as he prepares to spend the festive period away from the rest of the royals . His decision to stay home comes after he hit the headlines again over his connections with alleged Chinese spy Yang Tengbo, a man now banned from the UK . The festive celebrations at the King's private