London, England, United Kingdom
Tests conducted by the Road Research Laboratory against model dams built on this site during 1940-42 assisted Barnes Wallis in his development of the bouncing bomb (Upkeep), used by No. 617 Squadron Royal Air Force to breach the Ruhr Dams 16/17 May 1943 — Moor Lane, Harmondsworth
Listen to the audio guide for Barnes Wallis and Road Research Laboratory plaque Free on WIP — starts by itself when you arrive, even with the screen off