Sofia and Letizia, the best pictures

For the last ten years they have been monarch and princess but this week they both take the title of consort.  Sofia Margarita Victoria Federica and Letizia will both be queens of Spain, adding another chapter to a decade of shared stories.  Here are the best photographs of mother in law and daughter in law, two women from very different backgrounds but with a common destiny - to be Queen of Spain.