The Royal Mail issues a set of stamps to commemorate the 90th birthday of the Queen on April 20, 2016. Elizabeth is pictured with her father on the upper left. [Photo/IC]

Filial duty

"She adored her father. He was her hero. And when he died so suddenly so young, she made a promise to the British and to the world in general that she would be the servant of the people." - Martin Palmer, an adviser to Prince Philip, in an interview with China Daily.