National Public Order Intelligence Unit
Established in March 1999, the NPOIU incorporated the Animal Rights National Index, work that had previously been the responsibility of the various Special Branches. Initially operated as part of the Metropolitan Police Special Branch. and is now part of the Specialist Operations Business Group.
On 10 November, 2009, in a question in the House of Commons, MP Dai Davies (Blaenau Gwent, Independent), asked the then Secretary of State for the Home Department various questions about the National Public Order Intelligence Unit (NPOIU). In response, David Hanson (Minister of State (Crime and Policing), Home Office; Delyn, Labour) responded that the main purpose of the unit is to:
- Provide the police service with an ability to develop a national threat assessment and profile for domestic extremism.
- Support forces to reduce crime and disorder from domestic extremism.
- Support a proportionate police response to protest activity.
- Help forces manage concerns of communities and businesses in order to minimise conflict and disorder.
According to Her Majesty's Inspectorate of Constabulary the NPOIU "performs an intelligence function in relation to politically motivated disorder (not legitimate protests) on behalf of England, Wales and Scotland." by "co-ordinat[ing] the national collection, analysis, exploitation and dissemination of intelligence on the extremist threat to public order."
The NPOIU is based in London, either at Scotland Yard, or on the 5th Floor of Tintagel House on the bank of the River Thames. The unit has a staff of 60-70 officers and police staff, seconded from other forces, and has had its budget more than doubled in four years from £2.6 million in 2005/06 to £5.7 million in 2009/10. The unit is led by an officer of the rank of Detective Superintendent, as of 2006 this was Maria Smith of the Wiltshire Constabulary.
The NPOIU now forms one branch of the National Domestic Extremism Unit (NDEU), under the control of ACPO's National Coordinator for Domestic Extremism, Detective Chief Supt Adrian Tudway. The NPOIU works in conjunction with the National Extremism Tactical Co-ordination Unit (NETCU) and the National Domestic Extremism Team (NDET).
Confidential Intelligence Unit 
The Confidential Intelligence Unit was set up in 1999 through discussions held by the members of the Association of Chief Police Officers of England & Wales to observe extremist political groups throughout the UK. The section of the unit is led by an officer of the rank of Detective Chief Inspector.
Strathclyde Police were criticised by pacifist demonstrators at the Faslane nuclear submarine base, after their details were sent to the unit. Anti-genetically modified food protesters and Muslim university students have also been the target of surveillance by the unit.
In January 2011, it was reported that Mark Kennedy of the Metropolitan Police was one of the first officers to work as an undercover infiltrator for the NPOIU, and had spent seven years within the environmental protest movement. Kennedy later confirmed in an exclusive interview with the Mail on Sunday, arranged through his PR agent Max Clifford, that he as Simon Jenkins suspected suffered a version of "Stockholm syndrome," although he denied becoming an agent provocateur within the movement, adding that he had been incompetently handled by his superiors and denied psychological counselling.
Takeover by the Metropolitan Police 
In November 2010 it was announced that the three ACPO units commanded by the National Coordinator for Domestic Extremism would be rebranded as the National Domestic Extremism Unit and brought under the control of the Metropolitan Police by mid-2011.
Following The Guardian articles about the activities and accusations of Mark Kennedy, and the collapse of the trial of six activists, a number of initiatives and changes were announced:
- Acknowledging that "something had gone very wrong" in the Kennedy case to the Home Affairs Select Committee, Home Office minister Nick Herbert stated that ACPO would lose control of three teams involved in tackling domestic extremism. Herbert re-announced the already planned transfer of the units to the Metropolitan Police, with acting commissioner Tim Godwin confirming that this would occur at the earliest possible timescale.
- Her Majesty's Inspectorate of Constabulary announced that Bernard Hogan-Howe would lead an investigation into ACPO, to assess whether undercover operations had been "authorised in accordance with law" and "proportionate".
- The Serious Organised Crime Agency announced an inquiry into the conduct of Mark Kennedy.
- The Independent Police Complaints Commission announced an investigation into Nottinghamshire Police, over allegations it suppressed surveillance tapes recorded by Kennedy, the contents of which may have exonerated the six Ratcliffe activists.
See also 
- Forward Intelligence Team
- National Domestic Extremism Unit
- National Coordinator for Domestic Extremism
- National Extremism Tactical Co-ordination Unit
- National Domestic Extremism Team
- "Secret State: Timeline". BBC News. 17 October 2002.
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