Apply for British Citizenship.
If you intend to apply for British citizenship then you need to fill form AN, the current fee as of 16 July 2017 is £1282.00
To be naturalized you must meet the standard eligibility requirement and residential requirements.
Standard Eligibility Requirements:
> Be over 18 years of age
> Be of sound mind
> Sufficient proficiency in English
> Must pass life in the UK test
> Be of a good character
> Intend to continue living in the UK, or to continue crown service, the service of an international organisation
of which UK is a member, or the service of a company or association established in the UK.
> Meet the residential requirements
> 3 years continuous residence before the date of applying
> Not spent more than 90 days outside of the UK in the year before applying
> Not spent more than 270 days outside of the UK during the 3 year residency requirement
> Have been living within the laws of the UK immigration Rules during the entirety of this 3 year period.