Figure 8: National Insurance number registrations to adult overseas nationals entering the UK from the EU and non-EU
2007 to year ending March 2017 (these data are not designated National Statistics)
Source: Department for Work and Pensions, National Insurance number registrations to adult overseas nationals
The figures are based on recorded registration date on the National Insurance Recording and Pay As You Earn System (NPS), ie after the National Insurance number (NINo) application process has been completed, and are not a direct measure of when a person migrated to the UK.
Although figures do accurately reflect the number of NINos registered over time, a change to the process of recording NINos during Quarter 2 (Apr to June) 2014 means that the volume of NINo registrations recorded were lower in that quarter and then higher in Quarter 3 (July to Sep) 2014 than would otherwise be the case. Comparisons of NINo registrations over time between these periods should be viewed with caution.