This image is a derivative work of the following images: File:Uk_outline_map.png licensed with Cc-by-sa-3.0-migrated, GFDL 2007-03-31T00:14:54Z Tene 600x800...
Note that this map did not come directly from the above link; it simply demonstrates that Demis map data is public domain (as per Template:PD-Demis)...