I just asked in depth about this situation and I got some facts wrong.
It was the winter of 1941 (a few weeks before Pearl Harbor)
It involved an unarmed/unknown pilot who crashed landed in Scotland after making three such trips from germany to england.
The pilot said that he was on an covert diplomatic mission to establish a truce
and that Hitler was aware of the mission.
The commanding British officer believed that the pilot was Goering, but we'll never know for sure b/c Churchill quickly dismissed that Goering was in England and the pilot also got back to Germany (The British think)