When Daniel was given a school project about the war, Mr Kristiansen jokingly suggested that he go out and look for the aircraft.

"When Daniel was recently given homework about World War Two, I jokingly told him to go out and find the plane that is supposed to have crashed out in the field,” he told a Danish radio station.

Equipped with a metal detector, they began scouring the fields. To their surprise, the metal detector started beeping. They began digging with spades but failed to find anything so brought in a mechanical excavator.