I uploaded TICOM report I-172 ‘Interrogations of Hagen and Paschke of Pers Z S’. It mentions German work on British diplomatic codes.
Also added the following reports by Wilhelm Fenner ,head of the cryptanalysis department of OKW/Chi : DF-187 A-G, I-206 ‘Extracts from homework written by Min. Rat Wilhelm Fenner of OKW/Chi’ and I-200 ‘Interrogation of Min Rat Wilhelm Fenner of OKW/Chi’.
I have to thank Rene Stein of the National Cryptologic Museum for the DF-187 files and I-206 .Also Frode Weierud for editing them.