Individuals may normally apply for British citizenship after five years of qualifying residence, or three years if married to a British citizen. Individuals who have spent more than 90 days out of the U.K. in the twelve months prior to their application, or more than 450 days in the previous 5 years (270 days for three year applications) may well encounter difficulties with their applications. Applicants often need to prove that their tax affairs and N.I. contributions are up to date. Rajinder Narain  & Co has vast experience in advising clients on British citizenship applications, and on British nationality issues, and our team will be pleased to process your application on your behalf.