其實 Establish 呢條問題唔係咁簡單,因為1982年或之前的出世紙其實係無呢個欄位,要查返 British Nationality Act 1981 生效之前係點
:^(
https://en.wikipedia.org/wiki/British_Nationality_Act_1981
Prior to the Act coming into force, any person born in the United Kingdom or a colony (with limited exceptions such as children of diplomats and enemy aliens) was entitled to CUKC status.