White British is an ethnicity classification used in the 2011 United Kingdom Census. In the 2011 census, the White British population was 51,736,290, 81.88% of the UK total population (NB: This total includes the population estimate for Northern Ireland, where only the term 'White' is used in ethnic classification. National identity is listed separately in NI, where 40% classified themselves as British, making up a significant portion of the population, along with those specifying their national identity as Irish).