A family friend recently found evidence in a German submarine captain's log book that the bomber was hit by anti-aircraft guns fired from the deck of a German U-boat in the Bay of Biscay.

Mr Lübcke said Hans, who worked as a stoker on the U-boat, was born in 1890 in Hamburg ... place on a map could help families "close a book". Mr Lübcke had been contacted by the makers of ...