Overview

Tranche 4 of the Undercover Policing Inquiry will examine the activities of the National Public Order Intelligence Unit (its undercovers and its managers) which was active from 1999 to 2010. This will include former undercovers such as EN12 Mark Kennedy / ‘Mark Stone’ , EN34 ‘Lynn Watson’ , HN519/EN1 ‘Marco Jacobs’ , and HN596/EN32 ‘Rod Richardson’ .

Work on this tranche has begun, with most of the relevant anonymity applications having been determined. According to the Inquiry’s Twelfth Update Note (July 2023),  the Inquiry had started to send out witness packs and some police witness statements have been received. 

As of June 2024 all Rule 9 requests to undercovers had been sent; and witness statements from manager were also being received. Obtaining witness statements from those affected, government agencies or senior officers had yet to start.

Officers whose nominals start with EN (as opposed to HN or PN), will be heard in this tranche.  

It is believed hearings will begin November 2025.

Procedural

Date
Title
Document Type
Topic
Module 1 NPOIU Issues List
Issues list
Issues lists
The Undercover Policing Inquiry announces the dates of future hearings
Press Notice
Chair announces updates to the Inquiry’s timetable, including new Tranche 3 hearing dates
Press Notice
Chairman publishes an updated provisional decision on the anonymity of EN31
Press Notice
Anonymity
Inquiry publishes information in relation to NPOIU officers whose deployments fell within Tranche 4
Press Notice
General
Inquiry publishes information in relation to NPOIU officers whose deployments fell within Tranche 4 (updated 8 October 2025)
Press Notice
Gisted Psychiatric Report on EN60
Medical reports
Anonymity
Gisted Opinion on EN60
Medical reports
Anonymity
Minded To re anonymity application of EN643
Minded-To Note
Anonymity
Gisted Application for Anonymity on Behalf of EN643
Application
Anonymity
Chairman publishes an updated provisional decision on the anonymity of EN643
Press Notice
Anonymity
Ruling of Tranche 4 Procedural Hearing re NPCC
Ruling
Inquiry Chair issues Ruling following Procedural Hearing re NPCC
Press Notice
Chairman publishes provisional decision on anonymity application from EN60 and rules on anonymity for EN990
Press Notice
Anonymity
Anonymity: National Public Order Intelligence Unit (Minded-to Note 7, Ruling 4)
NPOIU Minded-To 7, Ruling 4
Minded-To Note, Ruling
Anonymity