Your first paragraph. And?
Second paragraph. Not that creative. Staring them in the face.
Third paragraph. Why?
Your first paragraph. Scrambling around clutching at straws. If they thought the route viable it could have been put to Bamber in his September 85 interviews.
Your second paragraph. Very creative, reasonable doubt created on this fact alone.
Third paragraph. Because the accused is supposed to have made a suicidal journey in the pitch black over acres of farmland in the middle of the night on a ladies bike with no lighting whatsoever.