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suspected threats to national security

If you know something about a threat to national security such as terrorism or espionage, we want to hear from you. You can send us information through our online Contact Form We will treat your information and any personal details in confidence unless you tell us otherwise or exceptionally if there is a need to share it with appropriate parties such as the police. You can remain anonymous if you wish. Your message will be sent securely. You will see an acknowledgement when you have sent your message.

 
All messages will be read. However, we cannot promise to respond to all of them.

Alternatively, you can contact us by telephone via:

  • Freephone 0800 111 4645 (free from BT telephones; mobile networks may charge)
  • 020 7930 9000 (standard call rates apply)
  • +44 20 7930 9000 (international callers only)

Please do not use the phone line for making enquiries about general matters or recruitment issues.

Or you can write to the following address:

The Enquiries Desk
PO Box 3255
London SW1P 1AE

Please be aware that written correspondence posted in the UK may take up to a week to reach us.

All calls and correspondence will be treated in confidence. (Please see our privacy policy for more details).

recruitment issues

If you have a query about applying for a job with MI5 we suggest that you look first at our careers section, which may answer your quesions.

If you still need to contact us about a recruitment issue, or you are having problems applying for a job with MI5 or accessing your online application, please contact the Recruitment Office by email or telephone:

Please do not use the general enquiry web form to submit queries about the recruitment process or your application to our website team. The Recruitment Office is best placed to help you.

Please note that due to the volume of enquiries we receive, we are not able to accept invites to attend careers events or to develop educational materials submitted via the website. We would be happy to send you some of our recruitment literature for use in your careers libraries instead.

media enquiries

MI5 does not have a press office.

If you work in the media and you would like to ask about intelligence matters or the Security Service, please contact the Home Office Press Office.

general enquiries and feedback

If you wish to give us feedback or make a general enquirey that has not been answered by the information on this site, you can get in touch using the Contact Form All messages will be read, though we cannot promise to respond to all of them. There are also restrictions on what information we can provide, so if we do respond we may not be able to provide you with the information you request.

complaints about our activities

If you wish to make a complaint about MI5, the Investigatory Powers Tribunal (IPT) will be able to help you.