The Duke of Edinburgh And Prince Harry Visit The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Harry attends a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

 Prince Harry and Prince Philip, Duke of Edinburgh attend a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Philip, Duke of Edinburgh shakes hands and shares a joke with a wheelchair-bound veteran as he attends a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Philip, Duke of Edinburgh shakes hands and shares a joke with a wheelchair-bound veteran as he attends a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Philip, Duke of Edinburgh shakes hands and shares a joke with a wheelchair-bound veteran as he attends a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Philip, Duke of Edinburgh attends a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England. 

Prince Harry attends a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England. 

Prince Harry attends a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Harry places a cross during a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England. 

Prince Philip, Duke of Edinburgh places a cross during a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

 Prince Harry and Prince Philip, Duke of Edinburgh attend a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Harry visits The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Harry visits The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Philip, Duke of Edinburgh visits The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Philip, Duke of Edinburgh visits The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Philip, Duke of Edinburgh visits The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England. 

Prince Harry visits The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England. 

Prince Harry visits The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Philip, Duke of Edinburgh and Prince Harry visit The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Harry visits The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Harry visits The Field Of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Britain's Prince Philip, Duke of Edinburgh, salutes after he plants a cross during a visit to the Field of Remembrance at Westminster Abbey in central London on November 5, 2015. The Duke of Edinburgh and his grandson Prince Harry each placed a Cross of Remembrance for Unknown British Soldiers from the First and Second World Wars.

Britain's Prince Harry (L) salutes next to his grandfather Prince Philip, Duke of Edinburgh, during a visit to the Field of Remembrance at Westminster Abbey in central London on November 5, 2015.

Prince Harry salutes during a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Britain's Prince Harry plants a cross during a visit to the Field of Remembrance at Westminster Abbey in central London on November 5, 2015. 

Britain's Prince Harry is pictured during a visit to the Field of Remembrance at Westminster Abbey in central London on November 5, 2015. 

Britain's Prince Philip, Duke of Edinburgh (L) looks at Watchman V, the mascot for the Staffordshire Regiment Association, during a visit to the Field of Remembrance at Westminster Abbey in central London on November 5, 2015.

Prince Harry meets Liam Young, a corporal in the Light Dragoons who served in Iraq and Afghanistan during a Service in the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England. 

 Prince Harry attends the opening of the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Harry attends the opening of the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Harry attends the opening of the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England

Prince Harry attends the opening of the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Prince Philip, Duke of Edinburgh attends the opening of the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England. 

Prince Philip, Duke of Edinburgh attends the opening of the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.

Poppies attached to the front of Prince Philip, Duke of Edinburgh's Rolls Royce seen as he attends the opening of the Field of Remembrance at Westminster Abbey on November 5, 2015 in London, England.