Hetreasures a framedletter from thePrinceofWales, thanking him on behalfof PrinceWilliamandHarryforhisprotective role during the "magical10days" oftheirfirstholidayinstTropez.
The Queen attended the service, along with the PrinceofWales and Duchess of Cornwall, PrinceHarry, and the Queen's granddaughter Zara Phillips with her husband Mike Tindall, whom she married earlier this year.
The BBC's Jenny Hill said the Queen, Duke of Edinburgh, PrinceofWales, PrinceHarry, Princess Beatrice and Princess Eugenie had all been seen out and about at Sandringham on Saturday morning before going to church.
Later, the PrinceofWales and Duchess of Cornwall, The Duke and Duchess of Cambridge and PrinceHarry will join the queen and Prince Philip for a Diamond Jubilee lunch provided at Westminster Hall.