which ethnic groups are found here?
The Celts, Romans, Anglo-Saxons, Norse and the Normans.
United Kingdom
the Celts, Romans, Anglo-Saxons, Norse and the Normans. 
who was william harper? He was a politician, general contractor and Royal Air Force fighter pilot where was he born? Born in Calcutta which political party was he a member of? Dominion Party can you mention any political achievement of his? Called for Rhodesia to abolish black representation in parliament and adopt "a form of political apartheid". when did he join the air force? Joined the RAF in 1937 how did this air force originate? Following publication of the "Smuts report" prepared by Jan Smuts the RAF was founded on 1 April 1918 which country does it belong to? It is the United Kingdom's aerial warfare force what symbols represent this organization? French system of three concentric rings was adopted, with the colours reversed to a red disc surrounded by a white ring and an outer blue ring. could you please describe the military of the country that it belongs to? "Her Majesty's Armed Forces" consist of three professional service branches: the Royal Navy and Royal Marines (forming the Naval Service), the British Army and the Royal Air Force.
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United Kingdom [SEP] Ethnic groups
Historically, indigenous British people were thought to be descended from the various ethnic groups that settled there before the 12th century: the Celts, Romans, Anglo-Saxons, Norse and the Normans. Welsh people could be the oldest ethnic group in the UK. A 2006 genetic study shows that more than 50 per cent of England's gene pool contains Germanic Y chromosomes. Another 2005 genetic analysis indicates that "about 75 per cent of the traceable ancestors of the modern British population had arrived in the British isles by about 6,200 years ago, at the start of the British Neolithic or Stone Age", and that the British broadly share a common ancestry with the Basque people.