Sir Ronald Flanagan, GBE, QPM, (born 25 March 1949 in Belfast) is a retired senior British police officer. He was the Home Office Chief Inspector of Constabulary for the United Kingdom excluding Scotland. Flanagan was previously the Chief Constable of the Police Service of Northern Ireland since its creation in 2001 to 2002, and had been Chief Constable of its predecessor, the Royal Ulster Constabulary (RUC) until 2001.
He joined the RUC in 1970 while studying Physics at Queen's University of Belfast. He resigned in 2002, and was replaced by Hugh Orde. Since then he has served in Her Majesty's Inspectorate of Constabulary and was appointed as HM Chief Inspector of Constabulary in 2005. He was tasked to review the police arrangements in Iraq in December 2005 as part of the British involvement there. Following Flanagan's retirement in December 2008, Denis O'Connor succeeded him as Her Majesty's Acting Chief Inspector of Constabulary.
Sir Ronald then took up the post of strategic adviser to the Abu Dhabi Police Force, a post he held for almost two years until he succeeded Lord Condon as chairman of the International Cricket Council's Anti-Corruption & Security Unit (ACSU).
On 22 January 2007 a report by the Police Ombudsman for Northern Ireland, Nuala O'Loan, made findings of collusion between members of the proscribed paramilitary organization, the Ulster Volunteer Force, and officers under the command of Flanagan. The reports were acknowledged by the then Chief Constable Sir Hugh Orde who apologized for the wrongdoing of his officers, and by the then British Secretary of State for Northern Ireland Peter Hain.
“While I appreciate that it cannot redress some of the tragic consequences visited upon the families of those touched by the incidents investigated in this report, I offer a whole-hearted apology for anything done or left undone.” – Hugh Orde
Flanagan denied any wrongdoing or acting with any knowledge of the events in question. He did not deny that these events had taken place. In the aftermath of the ombudsman's report, Irish nationalist politicians said he should be forced to resign or fired from his job as Chief Inspector of Constabulary.
The Police Ombudsman had criticised Flanagan's role in the RUC inquiry into the Omagh Bombing of 1998, in a report published in 2001, to which Flanagan's response was that he would “publicly commit suicide” if he believed her report was correct, though he later apologised for the form of words he used.
Flanagan's inspirational life has influenced many around the world, but none more so that the pupils at Methodist College Belfast. Viewed as one of the few successful upper-middle class Northernirishmen, he is thoroughly respected throughout the school, and continues to live up to his image today. 
- "Foreign post for Sir Ronnie Flanagan". Belfast Telegraph[dead link]. 2008-10-17.
- "Adviser to Abu Dhabi police is next ACSU chief". gulfnews.com. 2010-05-05.
- "Police collusion report 'stands'". BBC News. 2007-03-02. Retrieved 2008-07-30.
- "INTERVIEW: SIR RONNIE FLANAGAN (transcript)". BREAKFAST WITH FROST. BBC News. 2002-04-07. Retrieved 2008-07-30.
DAVID FROST:...if indeed the ombudsman judgement was correct I would not only resign I would go and publicly commit suicide, was that a bit over the top, would you, would you use those words again? RONNIE FLANAGAN: No I certainly would not,...
|Chief Constable of the Royal Ulster Constabulary
|Chief Constable of the Police Service of Northern Ireland
Colin Cramphorn (acting)
||Her Majesty's Inspector of Constabulary for London and the East Region
Sir Keith Povey
|HM Chief Inspector of Constabulary for England, Wales and Northern Ireland
Denis O'Connor (acting)
- Biography from Her Majesty's Inspectorate of Constabulary
- McKittrick, David (2001-12-15). "Ronnie Flanagan: The smooth operator". The Independent (London).