In the scene in the throne room, just after the wedding, the US Ambassador is introduced as "Cassius Clay". That is the birth name of boxer Muhammad Ali who defeated Henry Cooper, the man who played John Gully MP, the boxer.
At around 48 minutes, as Flashman and Rudi enter Strackenz, one of the cheering crowd of townspeople can be seen to pull out a compact camera and take a photograph of the procession, before resuming cheering.