Apply for Naturalisation Based on Crown Service

: Written by: Arshad Mahmood; Last Updated: 15 March 2026

You can apply for naturalisation as a British citizen if you are in Crown service under the Government of the UK, serving outside the UK on the date of your application. An application for naturalisation as a British citizen on grounds of Crown service is made using application form AN.

Premium Solicitors, open 7 days a week and 365 days a year, are specialist UK immigration solicitors. The high quality of UK visa and immigration services provided by our best team of fully qualified and experienced SRA-regulated immigration solicitors is self-evident from the 5-star Google Reviews rating by 99% of our clients.

Free Immigration Advice For Naturalisation Based on Crown Service

Our specialist team of immigration solicitors in London can provide one-off 5-minute free immigration advice in relation to your application for naturalisation as a British Citizen on the basis of Crown Service. Ask a question to our specialist team of immigration solicitors for free immigration advice online or book an appointment online for detailed immigration advice with our specialist immigration solicitors for your application for naturalisation as a British Citizen on the basis of Crown Service.

What is Crown Service?

According to the Home Office, UKVI Guidance, in general, an applicant is in Crown service if:

in an established permanent position, which can include a fixed-term
appointment; and
paid for his/her service directly from funds voted by Parliament; and
rendering service directly to the Crown

Honorary appointments, such as legal adviser to a British Embassy or High Commission, are not necessarily excluded from this definition. A statement or certificate from a Government Department or branch of the Armed Service, etc., should normally be accepted as evidence that the person is in Crown service.

What are the Requirements for Naturalisation Based on Crown Service?

Applicants applying under s.6(1) on grounds of Crown service abroad have to meet the requirements of good character, language and future intentions. But it is consistent with the principles of the BNA 1981 that applicants in Crown service abroad should also demonstrate that their service and connections with the United Kingdom are such as to make it right that the Home Secretary should exercise his/her discretion and naturalise them.

Additionally, the crown service applicants are expected to meet the following criteria for their applications for naturalisation as British Citizens to succeed:

Quality of service

The Home Office, UKVI, should normally expect applicants:

to be the holder of a responsible post; and
to have performed their duties to an exceptionally high standard

Examples are:

outstanding military service, especially in times of war
outstanding service representing Her Majesty's Government (e.g. as vice consul)
other service, significantly above and beyond the call of duty, which has been of direct benefit to the UK and its interests

Connections with the UK

These are, in order of importance:

past residence in the UK. The longer and more recent the residence, the better. A future intention to move to or return to the UK is not relevant to
establishing a connection with the UK
whereabouts of close family members: spouse, children, parents, siblings, UK or elsewhere
whereabouts of property house, other property, investments, including savings accounts, in the UK or elsewhere
whereabouts of, and contacts with, friends in the UK or elsewhere

Rank or grade

The more senior the applicant, the greater the likelihood that they will be able to meet the outstanding service requirement, though this does not rule out an applicant who has served in a junior post and who may have performed particularly deserving service.

Loyalty

Tested and demonstrably beyond question. For example, applicants may have put themselves at risk from a hostile foreign government or made themselves unpopular among their people by their commitment to the UK.

Length of service

Long service alone is not sufficient, but we would normally expect exceptional service to have been maintained for a significant period, rarely less than 10 years.

Naturalisation Based on Crown Service - Advantageous to the UK

An application from someone in Crown service who does not meet some or any of the criteria above may be made on the grounds that it would be advantageous operationally for that person to be a British citizen. In such cases, the employing department or service must demonstrate that advantage in some detail. An application put forward on this ground alone is rarely likely to succeed unless it can be shown that it is vital to UK interests that the applicant should be naturalised.

What Is a Request for Priority Service?

Where the Foreign and Commonwealth Office (Consular Directorate or an overseas post) requests that priority be given to an application on behalf of a Crown Servant, the application should be dealt with out of turn and processed as quickly as possible.

How We Can Help With Your Naturalisation Based on Crown Service?

Our expert team of naturalisation solicitors in London can represent you in your application for naturalisation as a British Citizen and carry out all the work on your British Citizenship application until a decision on your application is received from the Home Office UKVI. As part of our professional legal services in relation to your application for naturalisation as a British Citizen, our specialist team of naturalisation solicitors will carry out the following immigration casework:

Assessment of eligibility: Our immigration solicitors will assess your eligibility for naturalisation as a British Citizen by considering all the relevant information, including your past immigration history.

Advice on chances of success: Our immigration solicitors will advise you on the chances of success in your application for naturalisation as a British Citizen and will draw your attention to any weaknesses in your application.

Advice on documents: Our immigration solicitors will advise you on the list of documents to be submitted in support of your application for naturalisation as a British Citizen.

Assessment of supporting documents: Our immigration solicitors will assess all the supporting documents to ensure that the documents you provide satisfy the Home Office UKVI requirements for naturalisation as a British Citizen.

Completing and submitting the application form: Our immigration solicitors will complete the application form online, submit it, help you pay the Home Office UKVI fee for naturalisation as a British Citizen, and schedule your appointment with the UKVCAS appointment centre for biometric enrolment.

Preparing a detailed cover letter: Our immigration solicitors will prepare a detailed cover letter in support of the application, explaining in detail your eligibility for naturalisation as a British Citizen by referring to all the relevant information, documents, laws and requirements.

Uploading supporting documents online: Our immigration solicitors will upload all supporting documents online to be considered in support of your application, including our cover letter prepared for your application.

Follow-up work: Our immigration solicitors will carry out all the work on your application for naturalisation as a British citizen until a decision is received from the Home Office UKVI regarding your application.

Why Choose Us For Naturalisation Based on Crown Service?

There are a number of reasons why you can choose our British nationality law solicitors and lawyers in London to handle your application for naturalisation as a British Citizen on the basis of Crown service. The main reasons include the following:

High-Quality Legal Services: Our team of the best nationality law solicitors in London provides high-quality legal services for applications to naturalise as British Citizens on the basis of Crown service. The high quality of UK visa and immigration legal services provided by our best team of immigration lawyers is self-evident from the 5-star Google Reviews rating by 99% of our clients.

Remote Legal Services: Our specialist nationality law solicitors and lawyers can provide you with expert immigration advice and legal representations remotely for your naturalisation application on the basis of Crown service from our offices in London. Using modern technology, our specialist nationality law solicitors and lawyers can handle your application for naturalisation as a British Citizen on the basis of Crown service remotely, without you needing to visit our offices. Whilst we are more than happy to welcome clients into our offices, if this is their preference, we are proud to offer our legal services for naturalisation applications remotely to save you time and travel costs.

Open 7 Days A Week: We pride ourselves on providing dedicated advice and legal representation for naturalisation applications, available 7 days a week.

All Work Carried Out By Qualified Specialist Immigration Solicitors: Our specialist team of fully qualified and experienced nationality law solicitors, who have extensive experience dealing with naturalisation applications, will carry out all the casework on your application for naturalisation as a British Citizen on the basis of Crown service.

Free Immigration Advice Online: Our specialist team of nationality law solicitors and lawyers can provide one-off free immigration advice online for naturalisation as a British Citizen on the basis of Crown service through our website enquiry form.

Fixed Fees With Payment Plan: Our nationality law solicitors and lawyers charge reasonable and affordable fixed fees for an application for naturalisation as a British Citizen on the basis of Crown service with option to pay our fixed fee in two instalments whereby you pay half of the agreed fix fee when we start our work on your naturalisation application on the basis of Crown service and the remaining half when we have fully prepared the naturalisation application and it is ready for submission to the Home Office UKVI.

Specialist Immigration Solicitors for British Citizenship

Our immigration solicitors are specialists in British citizenship applications. As one of the best immigration solicitors for British citizenship applications, we have an excellent track record of helping clients succeed. Our highly experienced and fully qualified immigration solicitors can provide fast, friendly, reliable, and fixed-fee immigration advice and legal representation for your British citizenship application.

The high quality of UK visa and immigration legal services provided by our best team of immigration lawyers is self-evident from the 5-star Google Reviews rating by 99% of our clients. Our London-based immigration solicitors are available 7 days a week, 365 days a year, offering unwavering dedication and exceptional legal support for a wide range of UK visa and immigration cases. Our team of highly regarded immigration solicitors brings together more than 6 decades of collective, specialised expertise in successfully handling UK visa and immigration applications.

Meet Our Team of Immigration Solicitors in London

At Premium Solicitors, our strength lies in the expertise, dedication, and unwavering commitment of our immigration solicitors in London. We understand that British citizenship matters are life-changing, and our team is here to guide you through every step of the process with professionalism and care.

Our team comprises a diverse group of immigration solicitors, each bringing a wealth of experience and knowledge to the table. We are united by a shared goal: to deliver the highest level of legal support and advocacy tailored to your immigration needs.