List of HN nominals

The overview HN nominals of police officers is based on the timelines of SDS personnel and those higher up, provided by the Undercover Policing Inquiry - see Timelines and organisational charts. 

(Updated with the most recent version on 1 September 2026)

Legend - Name

[restricted]: Been given anonymity over real name by the Inquiry.
['cover name']: For UCOs who later had a manager role, but real name is restricted.

Legend - Role

UCO: Undercover officer
SDS Manager: Head of the Specal Demonstration Squad (Detective Chief Inspector) or Deputy Head (Detective Inspector)
SDS Staff: Administrative staff with responsibility for issues such as vehicles, preparation of reports, etc.; usually ranks Detective Sergeant, Detective Constable or were civilian staff.
SB Manager: Special Branch senior officers of rank Superintendent and above.
MPS Senior Officer: Assistant - or Deputy Commissioner, Commissioner.

In the early days, the Undercover Policing Inquiry also assigned people spied on ('none-state core participants') with HN numbers. They soon stopped doing that, and the HN numbers were never used.

In the interest of completeness: