1. Because this country is situated on the island.
2. Originally flag is used only to the sea as military and commercial ships of both countries. on may 5, 1634 year it was prescribed use only the military courts as гюйса (here and his обиходное the name of the «Union Jack» in the English - nasal flag ship or aircraft), while the trade court were to raise the flags of st. George (british) or st. Andrew (scottish). The ground forces continued to use the banners of their countries. In Scotland had some distribution of national option flag, in which the white cross st. Andrew was over the red English cross.