evidence: A person's country of birth does not change. Therefore, it is often the preferred measure when looking at the long-term changes in migration. To look at more recent changes, we recommend combining country of birth with year of arrival (for example, non-UK-born arrived in the last five years). [...] Some individuals may be born abroad but are British nationals, either through entitlement or naturalisation. This means they will appear in migration datasets as non-UK-born despite being a British national. Lucy and both their parents are British nationals. Lucy was born while their parents were working in the armed forces based overseas in Cyprus. They are therefore recorded as non-UK-born, so will appear in the migration data and statistics when looking at country of birth.