The Air Force Chronology for Friday, 12 March 1943:
(Eighth Air Force) VIII Bomber Command Mission No. 42:
72 B-17's are dispatched by the 1st Bombardment Wing against the
Rouen-Sotteville marshalling yard; 63 drop 156.5 tons of bombs on the target between 1241 and 1244 hours local.
There are no losses and no claims on this mission; good fighter escort is a major factor in this no-loss mission. Eighteen B-24's of the 2d Bombardment Wing fly a diversionary mission with no losses or claims. The 4th Fighter Group flies 43 sorties in their Spitfire Mk V's; 41 are flown on a flighter sweep and
1 Spitfire is shot down near St. Omer, France; the pilot is listed as MIA; we claim 2 enemy aircraft damaged. The other 2 sorties were shipping patrols.
A Spitfire loss: BL240 flown by Hazen S Anderson (POW), near St Omer. No MACR.
http://www.americanairmuseum.com/aircraft/19175
Lemke claimed an RAF Spitfire near Fecamp on 12 March 1943.
http://www.luftwaffe.cz/lemkes.html