First flight of the <a href="https://en.wikipedia.org/wiki/Gloster_E.28/39" id="mw5Q" rel="mw:WikiLink" title="Gloster E.28/39">Gloster E.28/39</a> the first British and Allied <a href="https://en.wikipedia.org/wiki/Jet_aircraft" id="mw5g" rel="mw:WikiLink" title="Jet aircraft">jet aircraft</a>.