There are different routes through which one can get British Citizenship:

The 5-year route to British citizenship:

If you have been living in the UK for more than 5 years and have no plans to leave for almost 12 months then you might be eligible for this category. Although there are different other factors also involved in the approving of citizenship.

3-year route for Naturalization:

If a person is married to a British resident then he/she can apply for naturalization, but only when he/she has lived for 3 years in the UK. Although there are complains in this route, it is still the fastest way of becoming a citizen of the UK.

Other routes:

There are many other routes through which a person can apply for citizenship. For example, a child born overseas to a British parent, he/she can apply for British citizenship. You need to research about this other source properly to get all the required information properly.

You must complete all your research properly and accumulate all the necessary information and documents so that you can get citizenship as fast as you can. All you need to do is fill a British citizenship application form and pass the test you will get the certificate of being the UK citizen.

You need to fill these forms and attach the required documents carefully so that you can avoid the risk of the canceling of the form. Improper documentation, wrong information, and not submitting all the required documents are some of the common reasons for rejection of the form.

Visit this website https://www.wmimmigration.com/uk-spouse-visa/ for getting settlement visa in UK.