British Citizenship by Registration or Naturalisation
After being settled for a year, BNOs can apply to register as British under section 4 of the British Nationality Act 1981, and adult dependents can naturalise as British.
It is worth noting that there are stricter residency requirements of no more than 450 days outside the UK during the 5 years prior to the date of application, and no more than 90 days outside the UK in the 12 months prior to the application.
可以去玩下練習題
BNO visa要唔要就未知
但印像中個test無有效期 pass左就pass左