[Peter Cornwell]

These are the only Ju88 losses I currently have listed on 21 May 1940. As you see, there is one that I believe could relate to that claimed by No.54 Squadron.

3.(F)/121 Junkers Ju88A-1. Starboard engine set alight in attacks by Adj Richardin, Sgt Roquerbe, and Lt Trezebinski of GC II/1 during photo-reconnaissance of roads south of Amiens. Also attacked by S/Lt Faisandier, Sgt Bayle of GC II/9, abandoned over Estrées-St-Denis, and crashed at Remy 12.30 p.m. BF Uffz Richard Bomsdorf and BM Obergefr Willi Sauer both killed, BO Lt Hans Wittmeyer baled out but killed, FF Lt Otto Nitschke baled out and captured wounded in shoulder – later released. Aircraft 100% write-off.

4.(F)/121 Junkers Ju88A-1. Forced-landed near Saargemünd due to electrical trouble and engine failure. Crew unhurt. Aircraft fired by crew 100% write-off.

9./LG1 Junkers Ju88A-1. Crash-landed near Cambrai and possibly that attacked by F/L Leathart of No.54 Squadron west of Boulogne 1.57 p.m. BS Gefr Herbert Rose badly injured - admitted to hospital in Cambrai, BO Uffz Gottfried Jakubowski, BF Fw Friedrich-Karl Meinshausen, and FF Uffz Richard Tilsner all slightly injured. Aircraft 100% write-off.

(Source: The Battle of France Then & Now)

If one accepts the 'friendly fire' theory (basis unknown to me) and was determined to try and make a case for it, then, as has already been suggested, it may prove more fruitful to examine claims filed by No.229 Squadron between Boulogne and Amiens at 2.15 p.m. that day ?