From "Instruments of Darkness" by Alfred Price....
At 04:30 am on 13th July 1944, a lone twin engined aircraft circled the airfield at Woodbridge in Suffolk. The runway controller took it to be a Mosquito and flashed a green 'clear to land' signal to the aircraft. The plane touched down and taxied to the end of the runway, where it switched off its engines. Its crew were standing around on the apron, stretching their legs, when the crew bus arrived to pick them up; and it was in this way that an RAF flight-sergeant came to find himself confronted with three live German air crewmen. The surprise was mutual, but the British NCO hurridly produced a Very pistol and forced the Germans to surrender. The "Mosquito", it now transpired was a fully equipped Junkers 88 night-fighter. Its inexperienced pilot had inadvertently steered a reciprocal course on his compass and arrived in England without knowing it. He had been lucky to reach Woodbridge; when the RAF technicians attempted to take a sample of fuel from the aircraft's tanks they found that there was insufficient even for analysis.
The captured Ju 88 was full of electronic equipment ominously unfamiliar to British Intelligence. It was equipped with both the new SN-2 radar and "Flensburg", the homer which enabled night-fighters to use the radiations from the RAF bombers' "Monica" night-fighter warning radar equipment. Most important was the discovery that SN-2 worked on a frequency of 85 megacycles which meant that standard "window" used for the last year had no effect............. The jamming immunity enjoyed by SN-2 during its 8 month operational life had come to an end."
Perhaps this German pilot had a Grandson?