"Out contribution to Enigma is something that we learned a lot about as children in Poland but we have a feeling that the knowledge is not so widespread. It was a crucial association which gave the allies the edge over the Germans.

"We were trapped on the wrong side of the Iron Curtain during the Cold War which meant we did not get the credit that we should have received and nobody wanted to admit that anyone in Eastern Europe had anything to do with Enigma.

"We felt it was important to fill in the blanks. It is our moral obligation to right this wrong and put this picture in a more complete way."

The Enigma machine was invented by German engineer Arthur Sherbius at the end of the First World War and was used by the military and governments of several countries. The British had struggled to work out how to crack the early Enigma machines, and by the early 1930s the Poles were way ahead.