Chris and Doug, many thanks indeed for your time in helping with this request.
His DKiG award according to the Ordenstrager is indeed 09-December-1941 as a Lt with 2/JG 2.
I noticed in his Wiki entry
http://en.wikipedia.org/wiki/Erich_Rudorffer
(and have seen mention in other areas) of "
He flew throughout the Battle of Britain, and legend has him being pursued down Croydon High Street below rooftop level by a Hurricane."
I want to ask the question as to whether this can be verified or not, or is this just an 'urban legend' which has grown over the years?
As always, I look forward to any input to expand on what has been posted already and to the 'Croyden High Street' incident accordingly.
Regards Richard.