KIRKWALL, SCOTLAND - MAY 31:  HRH Princess Anne, German President Joachim Gauck, Scotland's First Minister Nicola Sturgeon and British Prime Minister David Cameron attend the commemorations of the 100th anniversary of the Battle of Jutland at St Magnus Cathedral on May 31, 2016 in Kirkwall, Scotland. The event marks the centenary of the largest naval battle of World War One where more than 6,000 Britons and 2,500 Germans died in the Battle of Jutland fought near the coast of Denmark on 31 May and 1 June 1916.  (Photo by Jeff J Mitchell/Getty Images)