Winston S. Churchill, The Gathering Storm
http://www.onwar.com/chrono/1939/sep39/f20sep39.htm
RAF meets Luftwaffe in battle
Wednesday, September 20, 1939
On the Western Front... For the first time, RAF and Luftwaffe aircraft engage when a flight of German Me109 fighters attack 3 Fairey Battle reconnaissance bombers over the Siegfried Line, over Aachen; 1 Me109 and 2 Battles are shot down.
From London... Britain and France vow to keep fighting in response to recent peace offerings by Hitler. They declare that the Allies “will not permit a Hitler victory to condemn the world to slavery and to ruin all moral values and destroy liberty.” Meanwhile, the British Conservative Party government, under the leadership of Neville Chamberlain, is denounced by the Labour Party opposition, in the House of Commons, for failing to help Poland enough against the German and Soviet invaders.
The 3.7” AA gun of Great Britain was considered by the Germans to be comparable , if not superior, to the 88.
British Army requests in North Africa for assignment of 3.7s to the Army for anti-tank duty were refused on the grounds that the 3.7 was designed to shoot down aircraft, and that was what it would be used for. Captured 3.7s were used by the Germans - to kill tanks.