The British kingdom of Dumnonia comprised the present-day counties of Cornwall and Devon, and most of Dorset and Somerset. Here is the Wikipedia article on Dumnonia: http://en.wikipedia.org/wiki/Dumnonia
The challenge is for Dumnonia to be an independent nation in the present day comprising an area no smaller than that shown in this map: http://www.earlybritishkingdoms.com/maps/550_kingdoms.html.
The challenge is for Dumnonia to be an independent nation in the present day comprising an area no smaller than that shown in this map: http://www.earlybritishkingdoms.com/maps/550_kingdoms.html.