MI6, officially known as the Secret Intelligence Service (SIS), is the United Kingdom’s foreign intelligence agency, responsible for gathering and analyzing information outside the UK to protect national security. Operating under the authority of the Foreign, Commonwealth & Development Office, MI6 works covertly to counter threats such as terrorism, cyberattacks, espionage, and global instability. With a long history of intelligence operations and international partnerships, MI6 plays a crucial role in safeguarding the UK’s interests worldwide through strategic intelligence, discreet operations, and advanced security capabilities.
In this post, we’ve provided contact details of MI6, such as head office address, report a crime email address, enquiries email address, enquiries postal address, etc.
MI6 Head Office
MI6 head office address is, MI6 Head Office, 85 Albert Embankment, Vauxhall, Lambeth, London SE1 7TP, United Kingdom.
Report an immediate threat to life or property
If your information relates to an immediate threat to life or property, please contact the police by calling 999. You can call the police in confidence on 0800 789 321.
Report a Crime
MI5 is not a law enforcement agency. You can also call Crimestoppers on 0800 555 111.
Report a National Security Concern
You can leave a voicemail to report National Security concerns via:
0800 111 4645 (free telephone number)
+44 (0)20 7930 9000 (standard or international call rates will apply)
You can also write to them using the following address. Written correspondence posted in the UK may take up to a week to reach them.
The Enquiries Desk
PO Box 3255
London
SW1P 1AE
Questions About Recruitment
If you still need to contact them about recruitment, including because you are having problems applying for a job with MI5 or accessing your online application, please contact the recruitment office by email or telephone:
careers@recruitmentoffice.org.uk
0800 304 7568
History of M5 Enquiries
If 50 years have passed, to make a request, please write to them using the address below including a copy of your family member’s death certificate (this requirement is waived if the family member would be 110 or older if still alive) or their written consent.
The Enquiries Desk
PO Box 3255
London
SW1P 1AE
Make a Subject Access Request
The Data Controller
PO Box 3255
London
SW1P 1AE
Former Member Staff Help
If you are in need of support and think you may be eligible for the Trust’s help, please write to:
Cinquefoil Trust
PO Box 3255
London
SW1P 1AE
Helpdesk for Students and Teachers to Write MI5
They often receive letters from children asking about MI5 or telling them about their career ambitions for the future. They try to respond to as many as they can. If you would like to send them letters, please write to them at the following address:
The Enquiries Desk
PO Box 3255
London
SW1P 1AE
General Enquiries
If you wish to give them feedback or make a general enquiry that has not been answered by the information on their official website, you can get in touch using the contact form or write to:
The Enquiries Desk
PO Box 3255
London
SW1P 1AE
Source: MI6