text: Charles Stewart Henry Vane-Tempest-Stewart, 7th Marquess of Londonderry,  (13 May 1878 – 10 February 1949), styled Lord Stewart until 1884 and Viscount Castlereagh between 1884 and 1915, was a British peer and politician. He is best remembered for his tenure as Secretary of State for Air in the 1930s and for his attempts to reach an understanding with Nazi Germany. In 1935 he was removed from the Air Ministry but retained in the Cabinet as Lord Privy Seal and Leader of the House of Lords.
  His main record at the Air Ministry included:
  Background and education
  The eldest son of The 6th Marquess of Londonderry and Lady Theresa Susey Helen, daughter of The 19th Earl of Shrewsbury, he was educated at Eton College and at the Royal Military College, Sandhurst. His father's family were of partial East Donegal Ulster-Scots descent.