|“||Any presumption of law that an offence committed by a wife in the presence of her husband is committed under the coercion of the husband is hereby abolished, but on a charge against a wife for any offence other than treason or murder it shall be a good defence to prove that the offence was committed in the presence of, and under the coercion of, the husband.||”|
Section 37 of the Criminal Justice Act (Northern Ireland) 1945 (c.15) (N.I.) is identical to the section cited above and applies to Northern Ireland.
Differences from duress
While the defence of marital coercion has similarities to that of duress, it has significant differences:
- It must be proved that the defendant is the legal wife of the man who coerced her. A mistaken though reasonable belief that she was married will not suffice. Civil partnership does not suffice and a husband cannot claim marital coercion.
- Until 2013 it was thought that the burden of proof lay on the defence to prove marital coercion on the balance of probabilities. (For duress, the burden is on the prosecution to disprove duress beyond reasonable doubt.) However in the trial of Vicky Pryce the trial judge, Mr Justice Sweeney, ruled that the defence had only to show some evidence that the defence applied in order to require the prosecution to disprove the defence beyond reasonable doubt, as in duress cases.
- Duress requires a threat to kill or cause serious harm to a person. The Court of Appeal held in R v Shortland  that marital coercion need not involve physical force or the threat of force. (However mere loyalty to her husband does not suffice.)
- Section 47 requires the husband to be present when the offence is committed. The defence of duress does not require the presence of the person who issued the threat, provided that the threat is still effective.
- Duress is not a defence to attempted murder, but attempted murder is not excluded by the text of section 47 from the scope of marital coercion.
- Duress is a defence to some forms of treason, but marital coercion is not.
Proposals for reform
- Vicky Pryce advanced the defence of marital coercion at her 2013 trial for perverting the course of justice. She argued that she falsely accepted penalty points under the coercion of her former husband and Liberal Democrat Secretary of State for Energy and Climate Change Chris Huhne MP. Her use of the defence was unsuccessful, and she was unanimously convicted on 7 March 2013.
In the United States, the defense formerly existed in most jurisdictions. It has since been abolished in several states, including those adopting or influenced by the Model Penal Code, Section 2.09(3) of which expressly ends the presumption and abolishes the defense.
- Pace  Crim LR 82 contains a discussion of the defence and arguments in favour of its retention.
- Archbold Criminal Pleading, Evidence and Practice (2012) 17-133
- c. 86 15 & 16 Geo. V
- R v Ditta, Hussain and Kara  Crim. L. R. 42, CA
- The Guardian website
- The ruling on Crimeline
-  1 Cr. App. R. 116
- Archbold 17-119
- The Law Commission (1977) Defences of General Application (Law Com No.83).
- R. Camber, "Chris Huhne forced me take his speeding points, says his ex-wife as she denies perverting the course of justice", The Daily Mail, (1 June 2012)
- "Vicky Pryce guilty over Chris Huhne speeding points". BBC. 7 March 2013. Retrieved 7 March 2013.