Diplock courts were criminal courts in Northern Ireland for non-jury trial of specified serious crimes ("scheduled offences"). They were introduced by the Northern Ireland (Emergency Provisions) Act 1973 and used for serious and terrorism-related cases during the Troubles.[1] The Justice and Security (Northern Ireland) Act 2007 ended the automatic use of non-jury trials for scheduled offences but they are still used in Northern Ireland upon certification by the Director of Public Prosecutions on a case-by-case basis.[2]



Technically, the Diplock court was not a specially constituted court, but rather an ordinary criminal court before a single judge. From 1991 the relevant court was the Crown Court;[3] before that it was the Belfast City Commission[4][5] (alternatively the Belfast Recorder's Court until that was abolished in 1975[5]). A Diplock Crown Court usually sat in Belfast but the Lord Chief Justice of Northern Ireland had power to direct a particular case, or class of cases, or part of a case, to be heard elsewhere.[3]

The list of scheduled offences required to be tried by Diplock court included:

For some scheduled offences, the Attorney General for Northern Ireland could specify a jury trial of a particular case, so that for example a non-political murder would not use the Diplock courts.



The courts were established in response to a report submitted to the UK Parliament in December 1972 by Lord Diplock,[6] which addressed the issue of dealing with physical force Irish republicanism through means other than internment (which had been implemented in August 1971). In his report, Diplock cited two primary reasons for his recommendation that jury trials should be suspended:

Gerald Gardiner's Minority Report as part of the Parker Report in March 1972 found "no evidence of [intimidation] or of perversity in juries".[8] The report marked the beginning of the policy of "criminalisation",[9] whereby the State removed legal distinctions between political violence and normal crime, with political prisoners treated as common criminals. The report provided the basis for the Northern Ireland (Emergency Provisions) Act 1973, which, although later amended (with the Prevention of Terrorism (Temporary Provisions) Act 1974 and subsequent renewals), continued as the basis for counter-terrorist legislation in the UK.

Two years later, Lord Gardiner's review of the removal of trial by jury included attempts to bolster Diplock's findings as follows:

We are convinced on the evidence that we have received, that if juries were to be reintroduced for scheduled offences, their verdicts would still be subject to the influences of intimidation, or the fear of it. We have no evidence of this or of perversity in juries ...[10]

The establishment of the Diplock Courts can be seen as an early example of the Provisional Irish Republican Army's (IRA's) long-term aim of making "the Six Counties ... ungovernable except by colonial military rule".[citation needed] This was a central pillar of the "Long War" strategy set out in the 1977 Green Book.[11]

Diplock courts mainly tried republican or loyalist paramilitaries. In the first case in which a person not associated with the Troubles was tried and convicted, Abbas Boutrab, a suspected al-Qaeda sympathiser, was found guilty of having information that could assist bombing an airliner.[12] A sentence of six years was handed down on 20 December 2005.[13]

Conviction rates in Diplock courts were not considerably higher than in jury trials.[14] Between 1984 and 1986 the conviction rate was 51%, compared to 49% for jury trials in Northern Ireland and 50% in England and Wales.[14] The number of cases heard in Diplock courts reached a peak of 329 yearly in the mid-1980s. With the Northern Ireland peace process and paramilitary ceasefires of the latter 1990s, that figure fell to 60 a year in the mid-2000s.[15] The 1998 Good Friday Agreement underpinning the peace process included a British commitment to "security normalisation" including abolition of Diplock courts.[16] Sinn Féin pressed for this in the agreement negotiations, arguing that lack of juries denied accused republicans of the right to a fair trial. On 1 August 2005, the Northern Ireland Office announced that the Diplock courts were to be phased out, and in August 2006 they announced that the courts were to be abolished effective July 2007.[17] This was achieved under the Justice and Security (Northern Ireland) Act 2007.[16]

Post-2007 non-jury trials


The Criminal Justice Act 2003, applicable throughout the UK, allows jury-less trials where there is a risk of jury tampering (s.44).[1][18]

The Justice and Security (Northern Ireland) Act 2007 abolished the idea of "scheduled offences" automatically tried without a jury. Instead it allows for the Director of Public Prosecutions for Northern Ireland to certify a non-jury trial for any indictable offence provided it was committed either from a motive of "religious or political hostility" or by on behalf of a group which is both proscribed under the Terrorism Act 2000 and "connected with the affairs of Northern Ireland".[19] The act seeks to address the concerns which led to the establishment of Diplock courts by enhancing jurors' anonymity to prevent intimidation, and increasing randomised juror selection to prevent bias.[16]

The Northern Ireland Office's explanatory notes for the 2007 act characterise its changes as "repeal" of "the Diplock system" and its replacement with "a new system of non-jury trial".[16] On the other hand, courts in such trials have much the same format as the pre-2007 Diplock courts,[20] and have been called "Diplock courts" in the media.[1][21]

List of famous cases tried in Diplock courts


See also



  1. ^ a b c "Two jailed for life for killing policeman Stephen Carroll". ITV News. 30 March 2012. They were tried in a 'diplock court' by a judge with no jury; common in Northern Ireland for crimes connected to terrorism.
  2. ^ "'Diplock' trials could be coming to an end 50 years after they were first introduced". Belfast Telegraph. 7 November 2022.
  3. ^ a b Currently Justice and Security (Northern Ireland) Act 2007 s.4; previously Northern Ireland (Emergency Provisions) Act 1991 s.9(1); Northern Ireland (Emergency Provisions) Act 1996 s.10(1); Terrorism Act 2000 s.74 as enacted and as amended by Constitutional Reform Act 2005 Sch.4 par.288(2)
  4. ^ Northern Ireland (Emergency Provisions) Act 1978 s.6(1)
  5. ^ a b Northern Ireland (Emergency Provisions) Act 1973 s4; Northern Ireland (Emergency Provisions) (Amendment) Act 1975 s6(1)
  6. ^ Report of the Commission to Consider Legal Procedures to deal with Terrorist Activities in Northern Ireland (Cmmd. 5185); full text of the Diplock Report
  7. ^ Report of the Commission to consider legal procedures to deal with terrorist activities in Northern Ireland, Lord Diplock, Her Majesty's Stationery Office, 1972, page 17
  8. ^ Greer & White: Abolishing The Diplock Courts, page 91: Report of a Committee to consider, in the context of civil liberties and human rights, measures to deal with terrorism in Northern Ireland, Lord Gardiner.
  9. ^ Donohue, Laura (2007), Counter Terrorist Law and Emergency Powers in the United Kingdom 1922–2000, p. 155
  10. ^ Greer & White, Abolishing the Diplock Courts, p. 91.
  11. ^ Brendan O'Brien, The Long War: The IRA and Sinn Féin, Syracuse University Press, p. 23.
  12. ^ "Al-Qaeda terror suspect convicted", BBC News, 24 November 2005
  13. ^ "Al-Qaeda terror suspect is jailed", BBC News, 20 December 2005
  14. ^ a b Shanahan, Timothy (2008). The Provisional Irish Republican Army and the Morality of Terrorism. Edinburgh University Press. p. 171. ISBN 978-0748635306.
  15. ^ "Replacement Arrangements for the Diplock Court System" (PDF) (consultation paper). August 2006. Archived from the original (PDF) on 29 September 2006. Retrieved 11 August 2006.
  16. ^ a b c d "Explanatory Notes to Justice and Security (Northern Ireland) Act 2007". www.legislation.gov.uk. Retrieved 15 February 2019.
  17. ^ Bowcott, Owen (11 August 2006). "Northern Ireland's Diplock courts to be abolished soon". The Guardian. Retrieved 15 February 2019.
  18. ^ "Jury trials 'to become the norm'", BBC News Online, 11 August 2006
  19. ^ "Justice and Security (Northern Ireland) Act 2007 s.1". www.legislation.gov.uk.
  20. ^ Walker, Clive (2011). Terrorism and the Law. Oxford University Press. Chapter 11. ISBN 978-0-19-956117-9.
  21. ^
    • McDonald, Henry (20 January 2012). "Brian Shivers found guilty of Massereene murders". The Guardian. During the trial, distressing CCTV images of the soldiers' final moments were played to the court. It was held in a Diplock court with a judge but no jury – a measure designed to prevent intimidation of jurors.
    • "Ex-soldier appeals Diplock Court decision". 11 September 2018. Retrieved 15 February 2019. Former British soldier Dennis Hutchings has been given leave to appeal to the Supreme Court against a decision to try him in a Diplock Court.
    • "Judge-only trials urged amid 'unique risk of jury tampering'". Belfast Telegraph. 29 December 2017. Retrieved 15 February 2019. Use of a Diplock court in Northern Ireland where a judge hears cases without a jury is normally reserved for terrorism matters where jurors could be intimidated.
  22. ^ a b British plan to abolish Diplock courts next year[permanent dead link], The Irish Times, 11 August 2006
  23. ^ "Christy Walsh: a miscarriage of justice", Archived 16 February 2007 at the Wayback Machine, British Irish Rights Watch
  24. ^ "In response to the serialisation of loyalist killer Michael Stone's book". Relatives for Justice]
  25. ^ "Patrick Kane, Sean Kelly and Michael Timmons", Hansard, HC Deb 15 March 1995 vol 256 cc874-82
  26. ^ Taylor, Peter (1999). Loyalists: War and Peace in Northern Ireland. TV Books, p. 158. ISBN 1-57500-047-4.