During the First World War, Attingham was owned by Thomas, the 8th Lord Berwick. He had let the property to the Dutch-American Van Bergen family who encouraged the establishment of a hospital for wounded soldiers at Attingham. The hospital opened in October 1914 and by 1918 had 60 beds and an operating theatre. During the First World War, the 8th Lord Berwick served with the Shropshire Yeomanry and as a diplomat in Paris. Throughout the war years he corresponded with Teresa Hulton, whom he married in June 1919. During the First World War, Teresa Hulton had worked with Belgian refugees in London and as a Red Cross nurse in Italy.