The Queen And Duke Of Edinburgh Attend Service On the Eve Of The Centenary Of The Battle Of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II attends Service on the eve of the centenary of the Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England. 

Queen Elizabeth II and Prince Phillip, Duke of Edinburgh attend Service on the eve of the centenary of the Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II attends Service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Samantha Cameron and David Cameron attend Service on the eve of the centenary of the Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Samantha Cameron and David Cameron attend Service on the eve of the centenary of the Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II attends Service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II lays a wreath made of roses and bay leaves on the Grave of the Unknown Warrior at a Service on the Eve of the Centenary of the Battle of the Somme at Westminster Abbey on June 30, 2016 in London, United Kingdom

 

(L-R) Prince Philip, Duke of Edinburgh, The Dean of Westminster, Very Reverend Dr John Hall and Queen Elizabeth II bow after attending a Service on the Eve of the Centenary of the Battle of the Somme at Westminster Abbey on June 30, 2016 in London, United Kingdom.

Prince Philip, Duke of Edinburgh and Queen Elizabeth II arrive to attend a Service on the Eve of the Centenary of the Battle of the Somme at Westminster Abbey on June 30, 2016 in London, United Kingdom. 

Queen Elizabeth II attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II (Cullinan V Brooch detail) attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Queen Elizabeth II attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Prince Philip, Duke of Edinburgh attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Chief of the Air Staff, Air Chief Marshal Sir Andrew Pulford attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Chief of the General Staff, General Sir Nick Carter attends a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Prime Minister David Cameron and wife Samantha Cameron attend a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.

Prime Minister David Cameron and wife Samantha Cameron attend a service on the eve of the centenary of The Battle of The Somme at Westminster Abbey on June 30, 2016 in London, England.