With anti-monarchy protesters gathered outside Westminster Abbey and fresh scrutiny hanging over Britain's royal family in the wake of a police probe into Andrew Mountbatten-Windsor's ties to predator Jeffrey Epstein, the recent Commonwealth Day service could have been an uncomfortable affair. Instead, the royals did their best to keep the mood light as they arrived at the London landmark. There were warm greetings, easy smiles and even a moment of playful teasing, according to an expert lip reader.