[Graham Boak]

However, the cooling system was completely different with the radiators mounted in the wings. I suggest that this could simply be the correction of a mistake: or the result of the number of radio data plates exceeding the number of D production airframes. It is possible of course that an excess of D rear fuselages was produced, and these were then absorbed into the E production line. Any one of these three suggestions appears at least as likely (to me) than the actual conversion of a finished D into an E: the effort appears to be so large as to be more trouble than it was worth.