The Air Ministry reported Davis as "Wounded or Injured on Active Service" in its casualty list no.45 on 10.9.40 and "Previously Reported Wounded or Injured on Active Service, Now Reported Died of Wounds Received on Active Service" in list no.52 (16.11.40).
Courtesy of the RAF Commands forum, a casualty for N6921: LAC "Keith Reginald Dean 967882 , attached to Number 1 EFTS , was dangerously injured at 17;00 Hours on 27 June in a flying accident in DH82A Tiger Moth II N6921. When it crashed near Hatfield Aerxodrome, dying the following day of compound fractures"
Thanks Andy. And a Google Translate says: 07.07.1944, FFDSA10, D.H.TigerMoth, 3171, GM+RU, southeast water side Fl.Pl. Parov Student pilot Gefr Filipiak, Helmuth, injured Observer Oblt Dässler, Hermann, + Crash at sea due to operator error. Break 100%. Dässler Head of the Nav.Group."