Erhard Milch
It was impossible for these facilities to be secret, though they were camouflaged after hostilities began. They were war material production facilities built in "the shadow" of motor industry plants to facilitate technology transfer to aircraft construction and run, for a substantial management fee, in parallel under direct control of the motor industry business along with distributed facilities. General Erhard Milch, chief administrator of the Luftwaffe, was in Britain again in the autumn of 1937 inspecting new shadow factories in Birmingham and Coventry, RAF aeroplanes and airfields.