The First World War saw 321 former members of the school die serving their country. A war memorial was added to the school in 1923 for these fallen. This memorial was added to after the Second World War to include the 135 members of the school who fell in that conflict. The monument contains a statue of Sir Phillip Sidney, the Elizabeth soldier, poet and courtier who himself was a former member of the school and died of wounds sustained at the Battle of Zutphen in 1586, and it faces the Main School building down an avenue of linden trees, known as 'central'.