Should Prince Archie and Princess Lilibet use their official royal titles?

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Hi Royal Clubbers,

A big happy birthday to Prince Harry and Meghan's daughter Princess Lilibet, who turns three today!

The Sussexes usually mark the occasion in private, so don't expect any official photos or updates from their team. Although rumour has it Lili had a small pre-birthday bash over the weekend with her little pals at home in Montecito, Calif…