Britain's Queen Elizabeth II (L) 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 in London on June 30, 2016. Westminster Abbey is holding a Service on the Eve of the Centenary on June 30 2016, and an Overnight Vigil the first time the Abbey has been open all night for a vigil since peace vigils for the Cuban Missile Crisis over fifty years ago. The Abbey service and vigil are part of a programme of centenary events which includes vigils in Scotland, Wales and Northern Ireland, and at Thiepval, Northern France. / AFP / POOL / Niklas HALLE'N (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)
