Princess Eugenie has declared: "Beatrice and I, we've always had each other... she’s my big sissy, she's a legend."

And RadarOnline.com can reveal as the royal family faces seismic generational changes, it's this sisterly bond that is set to be one of future king Prince William 's most potent assets. Article continues below advertisement

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Princesses Beatrice, 36, and Eugenie, 35 – daughters of shamed Prince Andrew and Sarah, Duchess of York – are increasingly being seen as key figures in the next phase of royal reinvention, palace insiders tell us.

Though currently non-working royals, their growing public presence and unwavering loyalty to the institution have prompted speculatio

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