Yep, a squadron of Polish destroyers evacuated to Brtain before the war actually started. As did some submarnes during the war. The Polish navy also operated some vessels transfered fron the RN, including two lght cruisers among others.
Even though the country was occupied a lot of the military got out of t and continued to fight abroad.
Not all of these men were actually human too:
http://www.badassoftheweek.com/voytek.html
(contains strong language)