Apply for British citizenship if you're married to, or in a civil partnership with, a British citizen - form AN, who's eligible, fees and how to apply. You need to apply for a spousal visa, move to the UK, and go through the usual process for citizenship, which will take years.Our form wizard will help you and your family know what passport form(s) to use. Check if you can apply for British citizenship - find out what you need to be eligible, and how long you have to live in the UK before applying. Students can use this tool before lodging an application to find out what documents they need to attach to their application. Students can use this tool before lodging an application to find out what documents they need to attach to their application. 5 years if you're not married to or in a civil partnership with a British citizen. PulsePoint is a 501(c)(3) public non-profit foundation building applications that help public safety agencies inform and engage their citizens. FTI Consulting, a trusted business consulting firm providing expert advisory services to optimize performance and navigate complex challenges. HID Global makes it possible for people to transact safely, work productively, and travel freely through the latest physical and digital technology.