Use the nationality checking service and find out what to do if you've just become a UK citizen.
Find out how to apply to become a UK citizen on GOV.UK.
If you are an adult and have been given UK citizenship, you must go to a citizenship ceremony.
Get help with your citizenship application, make sure you have completed it properly and you have all the supporting documents.
The nationality document return service allows you to keep your documents while your online application for British citizenship is being processed.