Register as a BC from BNO status

Note : BC - British Citizen / BNO - British National (Overseas)

I would like to ask a question to the professions who are familiar about how BNO changes to BC status.

If I am a person who is,
1. born in Hong Kong before 1997
2. ethic Chinese, holding both BNO and HKSAR passports
3. never lived in the UK
4. having a UK university degree (through distance education)
5. married to a Swiss Citizen, and naturalised as a Swiss Citizen already
6. a resident of Switzerland

Therefore, I will have the right to live in the UK as other EEA nationals.
(Reference : https://www.gov.uk/eea-registration-certificate)

My question is, in the situation of having a BNO passport and the right of abode in the UK,

What are the possible ways for me to register as a BC?

* I am not planing to live in the UK for 5 years and not working in Crown service in Switzerland *

(Reference : https://www.gov.uk/register-british-cit ... -nationals)

None.