第一次續BN(O)用黎申請VISA ,要等5年先有機會入籍 -
It is six years rather than five years in your case. If you are getting a Tier 2 (General) visa, you can apply for Indefinite Leave to Remain (ILR) after five years in the UK. You will need to have ILR for at lease a year before applying for British Citizenship.
Once you have ILR, as a BN(O) passport holder, you can apply to register to become a British Citizen using form B(OTA). Registration is a cheaper method of getting British Citizenship than naturalisation.
https://www.gov.uk/government/publications/application-to-register-as-a-british-citizen-form-bota
A BN(O) passport holder, as a Commonwealth citizen, is entitle to register to vote in all UK elections. Being on the electoral roll helps you to build up your own credit history in the UK.