Hornet Flight von Ken Follett

It is June 1941 and the war is not going well for England. Across the North Sea, eighteen-year-old Harald Olufsen takes a shortcut on the German-occupied Danish island of Sande an discovers an astonishing sight that will change the momentum of the war. He must get word to England-except that he has no way to get there. He has only an old derelict Hornet Moth biplane rusting away in a ruined church: a plane so decrepit that it is unlikely ever to get off the ground…even if Harald knew how to fly it.