British Citizenship & UK Passports
Helping you secure your future in the UK
Becoming a British citizen is a significant milestone. We explain the eligibility criteria, application process, and supporting documents required to help you approach citizenship applications with clarity.
We an also undertake a nationality trace service, to provide complex advice regarding a potential claim to British citizenship based on your own or parents' history.
If you need help or advice with a British Citizenship application, please fill out the contact form with your details.
Naturalisation - apply to naturalise as a British Citizen following residence and settlement in the UK
Child Registration - apply for a child to register as a British Citizen
Adult Registration - apply to register as a British Citizen as an adult if you were born outside the UK to a British mother or an unwed British father and did not become a citizen at the time due to historical discrimination in UK nationality law
UK Passport - apply for a UK passport as a British Citizen
Nationality Trace - an advisory service to review your personal and family history to advise on a potential claim to British nationality
The benefits of our full application service include...
Why Choose Sussex Immigration Services?
Your future deserves expert care, not guesswork
At Sussex Immigration Services, immigration is never treated as just paperwork. Every case represents real lives, families, and futures. That’s why your matter is handled personally, carefully, and in line with the highest professional standards.
Fully regulated and accountable
Sussex Immigration Services is regulated by the Immigration Advice Authority (IAA) at Level 3, the highest level. This means you receive advice that is lawful, ethical, and properly supervised, with clear professional accountability at every stage of your case.
Direct access to your lawyer
Your case is handled personally by Kirstin Caspersen, the company’s Managing Director and Principal Adviser, from your first consultation through to completion. You won’t be passed between departments or junior staff. This ensures consistency, attention to detail, and a clear understanding of your circumstances throughout.
Clear, honest advice
UK immigration law is complex and constantly evolving. You will receive clear, straightforward advice tailored to your specific situation, including realistic assessments of your options, risks, and prospects. There are no guarantees and no false promises — just honest, professional guidance.
Careful and structured case preparation
Strong immigration outcomes rely on careful preparation. Each application or matter is approached methodically, with close attention to evidence, documentation, and procedural requirements.
Professional integrity and transparency
Fees are explained clearly in advance. You will be quoted a fixed fee for your application, with clear terms and payment schedule set at the outset of your case. You will always be told honestly if a case is weak or unsuitable to proceed. Your best interests, not volume or sales, come first.
Local service with wider reach
Based in East Sussex, Sussex Immigration Services assists clients locally, across the UK, and overseas. Wherever you are, you can expect the same careful, professional approach and commitment to your case.
Sussex Immigration Services Limited is authorised and regulated by the Immigration Advice Authority (IAA) at Level 3. Always work with a regulated immigration adviser. Click the IAA logo to verify our registration.