I dont know what you think looks like a Chipmunk in the German line. The 2 main aeroplanes in the line photo are a Bucker Jungmeister and Peter Holloways Klem KL35. The others where Bucker Jungman, ME108, Bucker Bestmann, Focke Wolf FW44 Stieglitz.

I think James was referring to the third aircraft away in the line. It does not look too dissimilar from a Chipmunk so I suppose one could make a mistake though easier to do so from a distance.

Martin