If you go to the
Imperial War Museums website, http://iwm.org.uk/collections/search , and search for internments, Alexandra Palace, Knockaloe, Wakefield, Dorchester, or other relevant terms, you can find a lot of interesting images.
Some of the prisoners whose names are mentioned are: A. Moro, George Mayer, C. Kurz, Steuer, von Boyneburg, Koehn, Riessner, Dr. Lutz, Fiegel, Prof. Feuerberg, Gunisch, Postel, Kapitan Tarnow, Lodter, Kupfer, Meister, Grusovnik, Faust, Schreiber, Schiller, Haeusler, Kuenzemueller, Fabian, Kapitan Karbiner, Bruegelmann, Wolters, Scuhmacher, Kapitan von Freeden, Kapitan Schlueter, W Schlundt, O Heyn, H.B., St Diet, J Sedlmayer, K Streitzig, K Richter, G Haering, H Kupfer, Hauptmann Bewer, Kreutzer, Froitzheim, Mayr, Wolters, Major Scmidt-Reder, Eduard Krohn. There are likely others as well. Some of these may have been POWs - unclear - but I think most were civilian internees.
There are numerous water colours of Alexandra Palace, by George Kenner, internee.
Not all entries have images, but presumably you could go to the Museum in question to see the item.
Another item which is probably very revealing but must be viewed in person at this time, indexed here, is
English transcript of Kenner's internment journal with related photographs and ephemera, Catalogue number Art.IWM ARCH 27.
Some fascinating images here, worth a look!