Information on the resident population of the UK by nationality and country of birth is published by Office for National Statistics at:
http://www.ons.gov.uk/ons/taxonomy/index.html?nscl=International+Migration
Information on the total number of British citizens who have obtained their nationality by naturalisation or by registration is not available.
Data is published on the annual number of grants of British citizenship based on naturalisation and registration made in each year from 1962 to 2013 in table cz 03 of Immigration Statistics, available in the library of the House and at: https://www.gov.uk/government/collections/immigration-statistics-quarterly-release<\/a>
The latest edition of table cz 03 is available at: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/283703/citizenship-q4-2013-tabs.ods<\/a>
From 1962 to 2013 there were 2.9 million grants of British citizenship based on naturalisation and 0.9 million grants based on registration. It is not possible to determine from the administrative data how many of the persons granted British citizenship since 1962 have subsequently died or changed citizenship.<\/p>"}
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