As an aside, as the photo linked below clearly shows, the Do17Z coded U5+EA of Stab./KG2, recorded as a 100% loss, was indeed recovered by the British and therefore may have been subject to an RAF Intelligence Report where mention of the markings/emblems could have been made?
http://www.flickr.com/photos/osborne...57625836754972
The location of the recovered wreck has been confirmed as Norwich...
Cheers
Peter D Evans
LEMB Administrator