You say "...not British" but the design is similar to the Dart Pup as well as an Airspeed design built for WS Shackelton in the 1930s. It is not unlike the Curtiss-Wright CW-1 Junior. Presently considering a German design.. Scratch that, looks like the Siebel Si-201's tail is different than the mystery ship.
Last edited by evansb; 24th Aug 2011 at 18:39.