Nobody could predict Queen Elizabeth II's enduring reign.

Her Majesty has held the highest position in the land for over six decades. Characterised by her dignified leadership, unyielding duty and courage, she's been a constant in an ever-changing world.

In this final instalment of 'Queen of the World', we explore how, in the face of scandal and tragedy, Queen Elizabeth II has ensured the survival of the House of Windsor.

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