Among the 2,917 aircrew who served in the RAF during the Battle of Britain, 2,334 were British, 145 were Poles, 126 New Zealanders, 98 Canadians, 88 Czechs, 33 Australians, 29 Belgians, 25 South Africans, 13 Frenchmen, 11 Americans, and 10 Irishmen.
Source: tatoeba (12336368)