YPRES, BELGIUM - JULY 31: Prime Minister Theresa May visits Passchendaele Landscape, a section on Exhibition Field where the conditions of 1917 have been recreated to offer visitors the chance to get a sense of what the battlefield would have looked like a hundred years ago, at the Passchendaele Memorial Park on July 31, 2017 in Ypres, Belgium. The commemorations mark the centenary of Passchendaele - The Third Battle of Ypres. (Photo by Chris Jackson - Pool/Getty Images)
