You have to possess a claim to UK citizenship based on ancestry otherwise you will have to apply for naturalization either after living in the UK for six years or via naturalization after three years living in the UK as a spouse of a person with citizenship. You have to pass the ‘Life in the UK Test’ before you can apply for UK citizenship.
If you are not married to someone with UK citizenship the requirements for naturalization are as follows: you should be eighteen years old or older and are of sound mind; you must be of good character; you should be able to communicate in the English language and you should intend to live in the UK.
The requirements for naturalization as a spouse of someone with UK citizenship are:
• You must have been living in the U.K at the beginning of the three year period
• On the date that you submit your application with the Home Office you must have permanent residence or have been given indefinite leave to remain in the UK
• During the three year period you must not have been outside UK for more than nine months
• During the last twelve months of the three-year period you must not have been outside the UK for more than ninety days
• You must not have been in breach of any UK immigration rules at any time during the three-year period of residence in the U.K.
If you want assistance with your naturalisation application (based on having permanent residence), there is an enquiry form for you to complete online.