Ingrid --
There are two other skeletons in the aircraft, the pilot and copilot, dressed in standard Luftwaffe flight gear. They're not as interesting initially because they're "expected," but eventually someone will get the bright idea to examine them as well.
I haven't yet decided whether the "general" is really British or German. I'm leaning British, and this whole thing ends up being a big hairball of a wartime Special Operations Executive op that went haywire. I'm still trying to figure out if all this works before I spend a lot of time developing it further.
A lot rests on whether there's a way to tell where the skeletons came from, beyond simply looking at what they're wearing. As The Man Who Never Was points out, clothes can be deceiving. If not, there's not a lot of detection that can profitably go on to work out the mystery. If Luftwaffe records fail to mention the flight, it's not proof that the flight wasn't launched by the Germans. Besides, I don't want to spend a lot of pages on people reading in archives (I just did that in SWIFTSURE, so I probably have to lay off that for a while).
Rudolf Hess flew himself to Scotland in 1941 in an attempt to negotiate peace with Britain. It didn't work.