Air Ministry - Adastral House

After the formation of the Air Ministry in 1918, its headquarters was on Kingsway; one of two identical buildings opposite Bush House became Adastral House, the name being derived from the RAF motto. This remained the home of the Air Ministry through WW2, and the roof of the building in 1940 during The Blitz is where, while fire-watching, Arthur Harris, made the remark about the bombing to a companion, "Well, they are sowing the wind...".

Air Ministry and British aerospace industry ..
War Ministries WW2 ..

Secretaries of State for Air, 1919–1946
Winston Churchill - 10 January 1919 to 1 April 1921

Frederick Edward Guest - 1 April 1921 to 19 October 1922 

Sir Samuel Hoare 31 October 1922 22 to January 1924
Christopher Thomson, 1st Baron Thomson 22 January 1924 to 3 November 1924 

Sir Samuel Hoare 6 November 1924 to 4 June 1929
Christopher Thomson, 1st Baron Thomson 1929 5 October to 1930† (R101 disaster)
William Mackenzie, 1st Baron Amulree 14 October 1930 to 5 November 1931 

Charles Vane-Tempest-Stewart, 7th Marquess of Londonderry 5 November 1931 to 7 June 1935
Philip Cunliffe-Lister, 1st Viscount Swinton 7 June 1935 to 16 May 1938
Sir Kingsley Wood 6 May 1938 to 3 April 1940
Sir Samuel Hoare, 3 April 1940 to 11 May 1940
Sir Archibald Sinclair 11 May 1940 to 23 May 1945 

Harold Macmillan 25 May 1945 to 26 July 1945
William Wedgwood Benn, 1st Viscount Stansgate 3 August 1945 to 4 October
1946

Television House - Wikipedia