I was fully aware of the Polish contribution - in fact it's mentioned on the Bletchley Park tour, which includes memorial to the Polish cryptographers.
A more correct version of my previous comment would have been "the mechanical device that was used to decrypt Enigma".
Bletchley Park fully recognizes the significance of the initial work done in Poland (see, for example, their annual Polish festival: http://www.bletchleypark.co.uk/calendar/event_detail.rhtm?re... and publications like this: http://www.bletchleypark.co.uk/content/hist/history/polish.r... and the Polish memorial on site).