Arson in royal dockyards and armories was a criminal offence in the United Kingdom and the British Empire. It was among the last offences that were punishable by capital punishment in the United Kingdom. The crime was created by the Dockyards etc. Protection Act 1772 (12 Geo. 3. c. 24) passed by the Parliament of Great Britain, which was designed to prevent arson and sabotage against vessels, dockyards, and arsenals of the Royal Navy.

It remained one of the few capital offences after reform of the death penalty by the Offences against the Person Act 1861 (24 & 25 Vict. c. 100), and remained in effect even after the death penalty was permanently abolished for murder by the Murder (Abolition of Death Penalty) Act 1965 in 1969. However, it was eliminated by the Criminal Damage Act 1971.

Passage The Dockyards &c. Protection Act 1772 was passed in order to protect military materiel from damage. At the time, ships were built of flammable oak wood and tar, and the naval yards were full of these supplies. Punishment for violating the act was a death sentence without benefit of clergy.

The act's first section made it an offence, anywhere in the British Empire, to "wilfully and maliciously burn, set on fire, or otherwise destroy":—Halsbury 1909 "Relations Between the Crown and Subject" Vol. VI p. 357 s. 516 "His Majesty's ships or vessels of war", whether afloat or being built, in a Royal Dockyard or private dockyard; buildings or materials in royal dockyards or ropeyards; buildings or contents of "military, naval, or victualling stores". The same punishment was mandated for aiding and abetting.

The second section allowed offences occurring outside the Kingdom of Great Britain to be tried in any assize court of England and Wales or sheriff court of Scotland.Roome & Ross 1922 p. 31 "Jurisdiction; Burning, etc., King's ships."

At the time of the act's passage, the death penalty was common under the "Bloody Code"; at the turn of the 19th century, 220 offences carried the death penalty. Setting fire was already a common law offence (arson in England and Wales, punishable by death with benefit of clergy;McLynn 2013 "Introduction" p. xi wilful fire raising in Scots law.) and setting fire to mills and coal mines were capital statutory offences without benefit of clergy.10 Geo. 2 c. 32 s. 6; 9 Geo. 3 c. 29 s. 2; cited by The 1772 act was categorised, under "offences against the monarch" (lèse-majesté), as "injuring the king's armour", together with a 1589 act which imposed a death sentence for stealing or removing ordnance or naval stores of value greater than 20 shillings.31 Eliz. 1 c. 4, amended by 22 Cha. 2. c. 5; McLynn 2013 "Property Crime" p. 94

While the Dockyards etc. Protection Act 1772 applied to anybody, Royal Navy personnel were already subject to the Navy Act 1661 and its 1748 replacement, which prescribed death for setting fire to any ships or stores other than enemy vessels.An Act for the Establishing Articles and Orders for the regulateing and better Government of His Majesties Navies Ships of Warr & Forces by Sea s. 26An Act for amending, explaining, and reducing into One Act of Parliament, the Laws relating to the Government of His Majesty's Ships, Vessels, and Forces by Sea s. 24

Prosecution

Only one prosecution is known to have been brought under the 1772 act;R. v. Hill (1777) 20 St. Tr. 1317 The Scottish saboteur John the Painter (also known as James Hill or John Aitken) was tried in March 1777 at the Hampshire spring assizes in Winchester Castle, for having set fire to the rope house at Portsmouth Royal Dockyard the previous December. He was found guilty and hanged from the mizzenmast of the frigate , the highest gallows erected in British history, with the ship moored at Portsmouth Royal Dockyards within view of the damage he had caused. A crowd of 20,000 gathered to witness the hanging. John the Painter had also tried to burn merchant vessels in Bristol, in response to which a bill was introduced in the Commons extending the 1772 act from naval to private ships and docks; but it was dropped at committee stage.

The indictment against John the Painter charged that he "feloniously, wilfully, and maliciously, [certain buildings, hemp, ropes and cordage] did set on fire and burn, and cause and procure to be set on fire and burnt, against the form of the statute in such case lately made and provided, and against the peace of our said lord the king, his crown and dignity". The sample indictment in the 1922 edition of Archbold Criminal Pleading, Evidence and Practice states the offence as "Arson, contrary to section 1 of the Dockyards Protection Act, 1772."Roome & Ross 1922 pp. 751–752 "Indictment for setting Fire to Ships of War, etc." The offence was not triable at quarter sessions.

After the June 1772 burning of HMS Gaspee in Warwick, Rhode Island, the Earl of Hillsborough as Secretary of State for the Colonies proposed invoking the act, but Edward Thurlow and Alexander Wedderburn, the chief English law officers, advised that it did not apply since the Gaspee had not been in a dockyard.

The systematic collection of criminal statistics for England and Wales began in 1856, and record no further sentences under the 1772 act. In 1913 suspicions that the suffragette arson campaign would target a royal dockyard were fanned by a letter discovered in April and the fire in December at Portsmouth semaphore tower; some reports of both incidents mentioned the capital offence. Sabotage was initially suspected after a 1950 explosion at DM Gosport in Portsmouth, and Sir Jocelyn Lucas asked during question time whether the 1772 act would be applied to the perpetrators; Clement Attlee's reply was noncommittal.

Amendment and repeal The offence created by the 1772 act was included in the Judgment of Death Act 1823 among those for which the judge could record a death sentence while substituting a lesser one.Halsbury 1909 "Criminal Law and Procedure" Vol. IX s. 734 p. 376 fn. s It was among those for which the 1837 Punishment of Offences Bill, as introduced, proposed to reduce the penalty from death to transportation. However, the House of Lords deleted this provision in committee on the ground that the offence was tantamount to treason.HC Deb 15 July 1840 vol 55 cc742–3 For a like reason, the Commons voted to exclude it from Lord John Russell's 1840 Substitution of Punishments of Death Bill and its enacted 1841 version. Russell introduced a separate bill in 1841 specifically to tighten the wording of the 1772 act to remove the penalty in "cases in which there might be no destruction of naval stores, no treasonable intent, nor any view to cripple the resources of this country". The Criminal Law Consolidation Acts 1861 sharply limited the death penalty for civilians to only five crimes, namely: arson in royal dockyards, murder, treason, espionage, and piracy with violence. Of the 1861 acts, the Criminal Statutes Repeal Bill originally proposed repealing the 1772 act "as to the United Kingdom" but this was again deleted at committee.Compare Criminal Statutes Repeal Bill as introduced (14 February 1861): (HC 1861 v. 1 (24) 785 p. 5) as amended by Select Committee (2 May 1861): HC 1861 v. 1 (124) 790 pp. 4–5 Unsuccessful Disraeli ministry bills of 1878 and 1879, which attempted to establish a criminal code for England (and Wales) and Ireland, would have repealed the 1772 act in those jurisdictions and made arson in royal dockyards a capital offence only in wartime. Criminal Code (Indictable Offences) Bill 1878 [HC 1878–9 v. 2 (178) 5] s. 38, s. 425, Second Schedule Part I Criminal Code (Indictable Offences) Bill 1879 [HC 1879 v. 2 (170) 427] s. 81, s. 552, Second Schedule Part I The Blackburn Commission, which drafted the 1879 bill, suggested alternatively deleting the offence altogether and punishing as simple arson instead.

The above bills and acts applied to England and Wales, and most also to Ireland, but not to Scotland. The Criminal Procedure (Scotland) Act 1887 restricted capital punishment there to murder, attempted murder, and treason, implicitly abolishing it for the 1772 offence.

The Naval Discipline Acts of 1860 to 1866, which replaced the Navy Act 1748, permitted lesser penalties than death for its firesetting offence.Naval Discipline Act 1860 (23 & 24 Vict. c. 123) s. 30; Naval Discipline Act 1861 (24 & 25 Vict. c. 115) s. 30; Naval Discipline Act 1864 (27 & 28 Vict. c. 119) s. 30; Naval Discipline Act 1866 (29 & 30 Vict. c. 109) s. 34Roome & Ross 1922 p. 748 "Setting Fire to or Destroying Ships, etc." Under the Naval Discipline Act 1957, which replaced the 1866 act, arson in dockyards came under "destruction of public and service property", punishable by imprisonment.Naval Discipline Act 1957 ss. 29, 137; Sixth Schedule

The Statute Law Revision Act 1888 deleted the superfluous enacting formula from section 2 of the 1772 act.Statute Law Revision Act 1888 preamble, s. 1(1) and Schedule Part I The short title "Dockyards etc. Protection Act 1772" was assigned by the Short Titles Act 1892 and again by the Short Titles Act 1896. The Children Act 1908 (8 Edw. 7. c. 67) removed the death penalty for under-16s.

The Attlee ministry's Criminal Justice Bill 1948 was amended by the House of Commons so that the death penalty for murder would be abolished, and that during peacetime the suspension would extend to other capital offences including arson in royal dockyards. However, this was not accepted by the House of Lords, and eventually the bill as enacted omitted these provisions, although an unofficial suspension of the death penalty lasted for several months.

The Murder (Abolition of Death Penalty) Act 1965 temporarily abolishing the death penalty for murder was made permanent by parliamentary resolution in 1969,Hansard: HC Deb 16 December 1969 vol 793 cc1297, HL Deb 18 December 1969 vol 306 cc1264-1321; leaving the provisions of the Dockyards etc. Protection Act 1772 as one of the four civilian crimes that retained the death penalty. The Criminal Law Act 1967 removed the obsolete references to assize courts and "benefit of clergy" from the 1772 act.

Various acts and subordinate legislation made non-textual amendments extending the scope of the 1772 act so that by 1970 it applied to "naval vessels, naval, military or Air Force installations and certain property vested in the Minister of Technology". That year, the Law Commission's report on the law on criminal damage proposed that the crime be abolished in its draft consolidation bill. This came after the fact that the law was no longer required for its original purposes, as warships were no longer made of flammable materials. The resulting Criminal Damage Act 1971 duly repealed the 1772 act and abolished the offence of arson in royal dockyards and armories.;

The whole act was repealed for the Isle of Man by section 1(1) of, and group 1 of part I of schedule 1 to, the Statute Law (Repeals) Act 1993, which came into force on 5 November 1993.

The Crime and Disorder Act 1998 and the Human Rights Act 1998 abolished the death penalty for all remaining crimes. In a speech in the House of Lords on the Crime and Disorder Bill, Lord Goodhart stated that the dockyard arson offence disappeared from the list of capital crimes in 1971 "without, so far as I am aware, either comment or concern."

Despite abolition in the United Kingdom, a 2004 episode of the comedy quiz show QI asserted that it is still popularly and erroneously believed that arson in royal dockyards continues to exist as a capital offence. Though similar crimes have occurred since abolition, they are now dealt with under general laws relating to arson.

Applicability outside the United Kingdom