• Source: Weights and Measures Acts (UK)

Weights and Measures Acts are acts of the British Parliament determining the regulation of weights and measures. It also refers to similar royal and parliamentary acts of the Kingdoms of England and Scotland and the medieval Welsh states. The earliest of these were originally untitled but were given descriptive glosses or titles based upon the monarch under whose reign they were promulgated. Several omnibus modern acts have the short title "Weights and Measures Act" and are distinguished by the year of their enactment.




Background


There have been many laws concerned with weights and measures in the United Kingdom or parts of it over the last 1,000 or so years. The acts may catalogue lawful weights and measures, prescribe the mechanism for inspection and enforcement of the use of such weights and measures and may set out circumstances under which they may be amended. Modern legislation may, in addition to specific requirements, set out circumstances under which the incumbent minister may amend the legislation by means of statutory instruments. Prior to the Weights and Measures Act 1985, weights and measures acts were only concerned with trade law where the weight or size of the goods being traded was important. The 1985 act, however, had a broader scope, encompassing all aspects covered by the European Economic Community (EEC) European Commission directive 80/181/EEC.
As of 25 April 2012, the current primary legislation in the United Kingdom is the 1985 act, which was last amended by statutory instrument in 2011. Statutory instruments made under the authority of the act do not amend the act per se, but regulate particular areas covered by the act.
The act is currently enforced by the 200 Trading Standards offices managed by local authorities around the country. Definitions of units of measurements and the technical equipment relating to weights and measures are provided by the National Measurement Office, an agency of the Department for Business, Innovation and Skills.




= Statute measure

=
Historically, many units had various customary definitions—by locality or trade, for example. Where these units also had a standard, legally defined definition, such as given in a weights and measures act, this was known as the statute measure. So a land area might be given as 24 acres—statute measure, to clarify that it was the acre defined in statute, rather than a customary acre of a different size, that was being used. Units that had statute-defined measures as well as customary measures were the acre, mile, perch, pole and ton. The level of legal enforcement of statute measures achieved between the mid nineteenth and the beginning of the twentieth centuries meant that only "statute mile" and "statute ton" needed qualifying beyond then. The statute mile still needed to be differentiated from the nautical mile, but the others, and the term "statute measure" itself, are now only used in a historical context.




Metric units of measure



The Weights and Measures (Metric System) Act 1897 (60 & 61 Vict. c. 46) provided that metric units could be used in addition to the traditional imperial units for purposes of trade. In practice, the actual choice of units was restricted by price marking orders which listed packaging sizes and pricing structures that might be used in specific circumstances. For example, as of April 2012, wine for consumption on premises may only be sold in 125, 175, and 250 mL glasses while draught beer may only be sold as 1⁄3, 1⁄2, or 2⁄3 pint and integer multiples of 1⁄2 pint. Prior to 1973, when the United Kingdom joined the EEC, such specifications were almost all in imperial units.
As part of its attempt to harmonise units of measure between the member states of its Internal Market, the European Commission (EC) issued directive 80/181/EEC which set out the units of measure that should be used for what it called "economic, public health, public safety, and administrative" purposes. To comply with this directive, the Weights and Measures Act 1985 extended the scope of Trading Standards responsibilities from just matters related to trade to all aspects of the directive. For example, it was the Trading Standards Office that criticised the use of sub-standard weighing machines in NHS hospitals.
To help ease the EC's desired transition from sole use of imperial units to sole use of metric units, the directive permitted the use of what were termed "supplementary indicators"—the continued use of imperial units alongside the metric units catalogued by the directive (dual labelling). The initial intention was to prohibit dual labelling after the end of 1989, with metric units only being allowed after that date. This deadline was later extended: first to the end of 1999, then to the end of 2009. Finally, in 2007, the European Union (EU, as it had become) and the EC confirmed that the UK would be permitted to continue indefinitely to use imperial units such as pints, miles, pounds and ounces as at present. The Gloucestershire County Council Trading Standards Department confirmed the EU ruling that the previous deadline for ending dual labelling had been abolished.
There are still a few cases where imperial units are required to be used and where metric units are not permitted within the scope of the Weights and Measures Act, such as the pint for the sale of draught beer and cider, and miles and yards for distances on road signage. Milk in returnable containers may be sold by the pint and the troy ounce may be used for the sale of precious metals. In addition, British law specifies which non-metric units may be used with dual labelling (for example the imperial gallon, but not the US gallon).




England






= Acts of the Witenagemot

=

Numerous acts of the Saxon kings are known to have been lost. Those that have survived include:



10th century

2 Edgar c. 8 (959 x 963):

The statute also survives in a few other Old English and Latin copies, some which omit mention of London and describe "the measure held at Winchester", an indication that a standard ell or yard was nominally in use:

John Quincy Adams's 1821 report on the history of English weights and measures notes of this act that "it was never observed".




= Acts of the Royal Council

=



11th century

3 William I c. 7 (1068):



12th century

9 Richard I c. 27 (1197):




= Acts of Parliament

=



Statutes of uncertain date

The statutes of uncertain date (Latin: Statuta temporis incerti) are generally dated to the mid-to-late 13th century.

The Assize of Bread and Ale (Assisa Panis et Cervisiae), sometimes dated to 51 Henry III (1267–8).
Statute I - Section III.

Statutum de Pistoribus, et cetera
The Statute concerning Bakers, et cetera

Tractatus de Ponderibus et Mensuris
Also known as the Tractatus de Ponderibus, Compositio de Ponderibus ("The Composition of Weights"), Assisa de Ponderibus et Mensuris ("Assize of Weights and Measures") or the Weights and Measures Act 1303. It is important to note when reading it that, in the Latin and English text, "hundred" (and the Latin numeral c.) is used for four separate concepts: the Germanic long hundred of 120, the short hundred of 100, several units of either value, and a separate unit (the hundredweight) of 108 pounds.
The form in which it appears in Cotton MS Claudius D2 where it is dated to 31 Edw. I (1303) is:

The original Tractatus was written in Latin. Some later English translation copies contain differences that change the meaning. One of the copies of the Tractatus contains the first use of the word avoirdupois in England. However, the word does not refer to a weight system but to a class of goods: viz., heavy goods sold by weight rather than by capacity, count, or other means. However, it does not count as the first occurrence of the word in English.

Statutum de Admensuratione Terrase
Also known as "A Statute for the Measuring of Land" or "An Ordinance for Measuring of Land" or "33 Edw. 1 Stat. 6. (1305)".
"When an Acre of Land contianeth 10 Perches in Length, then it shall be in Breadth 16 Perches."

The Statute on the Composition of Yards and Perches (Latin: Compositio Ulnarum et Perticarum, lit. "On the Composition of Arms [=Ells] and Perches") is dated to 1266 x 1303. Its content varies among surviving accounts. One reads:

The Liber Horn account reads:

This document seems to have had the effect of redefining the yard, foot, inch, and barleycorn to 10⁄11 of their previous values, but leaves the rod and acre unchanged. The rod thus became 16½ feet instead of 15.



13th century


9 Henry III c. 25 (1225)

Although signed in 1215, Magna Carta was not ratified by Parliament until 1225, by which time it had become substantially abridged. Chapter 35 of Magna Carta of 1215 (which dealt with weights and measures) became chapter 25 of Magna Carta of 1225.



14th century

14 Edw. 3 Stat. 1. c. 12 (1340)
"Bushels and Weights shall be made and sent into every Country."
18 Edw. 3 Stat. 2. c. 4 (1344)
"Commissions to assay Weights and Measures shall be repealed, and none such granted."

25 Edw. 3 Stat. 5. c. 9 (1350)

25 Edw. 3 Stat. 5. c. 10 (1350)

27 Edw. 3 Stat. 2. c. 10 (1353)

A chapter of the Statute of the Staple that provides for justices to be appointed to hear charges of measuring fraud at the staple ports. Those found guilty were liable for quadruple damages and 2 years' imprisonment.

31 Edw. 3 Stat. 1. c. 2 (1357)
"No Wool shall be bought by Fraud to abate the Price thereof. Weights shall be sent to all the Shires."
4 Ric. 2. c. 1 (1380)
"All Vessels of Wine, Honey, and Oil brought into this realm shall be gauged."
13 Ric. 2. Stat. 1. c. 9 (1389)
"There shall be but one Weight and one Measure throughout the Realm, saving in the County of Lancaster. The Weight of Wool, and the Refuse thereof."
15 Ric. 2. c. 4. (1391)
"There shall be but eight Bushels of Corn striked to the Quarter."

16 Ric. 2. c. 3. (1392)
"The Clerk of the Market shall carry with him all his Weights and Measures signed."



15th century


1 Hen. 5. c. 10 (1413)
An Act concerning the true Measure of Corn.

2 Hen. 5. Stat. 2. c. 4 (1414)

First notice of troy weight in statute.

8 Hen. 6. c. 5 (1429)

18 Hen. 6. c. 16 (1439)

18 Hen. 6. c. 17 (1439)
Vessels of Wine, Oyl, and Honey, shall be gauged.



11 Hen. 7. c. 4 (1494)
An Act for Weights and Measures.

12 Hen. 7. c. 5 (1496)
An Act for Weights and Measures.



16th century

Verdict of the Pyx 18 Henry VIII (1527)

23 Hen. 8. c. 4 (1531)
An Act that no Brewers of Beer or Ale shall make their Barrels, Kilderkins or Firkins within them, and how much the same Barrels, et cetera shall contain.

24 Hen. 8. c. 3 (1532)
An Act for flesh to be sold by weight, and the prices limited.

24 Hen. 8. c. 4 (1532)
An Act concerning sowing of Flax and Hemp.

5 & 6 Edw. 6. c. 6 (1552)
An Act for the true making of Woolen Cloth.

4 & 5 Ph. & M. c. 5. par. IX (1557–8)
An act touching the making of woolen clothes.

23 Eliz. 1. c. 8 (1581)
An Act touching the true melting, making and working of Wax.

35 Eliz. 1. c. 6 (1593)
An Act against converting of great Houses into several Tenements, and for Restraint of Inmates and Inclosures, in and near about the City of London and Westminster.

This is the codification and namesake of the statute mile.

35 Eliz. 1. c. 10. par. III (1593)
An act for the reformation of sundry abuses in clothes, called Devonshire kersies or dozens, according to a proclamation of the thirty-fourth year of the reign of our sovereign lady the Queen that now is.



17th century


16 Cha. 1. c. 19 (1640)
An Act for the better ordering and regulating of the Office of Clerk of the Market, allowed and confirmed by this Statutes; and for the Reformation of false Weights and Measures.

22 Cha. 2. c. 8 (1670)
An Act for ascertaining the Measures of Corn and Salt.
First mention of Winchester bushel in statute.

22 & 23 Cha. 2. c. 12 (1670)
An additional Act for ascertaining the Measures of Corn and Salt.
8 & 9 Will. 3. c. 22. s. 9 (1696–7)

First definition of Winchester bushel in statute (≈2,150.42 cubic inches).



18th century


11 Will. 3. c. 15 (1700)
An Act for ascertaining the Measures for retailing Ale and Beer.

1 Ann. c. 9 (1701)
An Act to ascertain the Water Measure of Fruit.




Great Britain






= Acts of Parliament

=



18th century


6 Ann. c. 27 (1706)
An Act for continuing several Subsidies, Impositions and Duties and for making Provisions therein mentioned to raise Money by Way of Loan for the Service of the War, and other Her Majesty's necessary and important Occasions, and for ascertaining the Wine Measure.

This statute is the origin of the US gallon, also known as the Queen Anne Gallon, Queen Anne Wine Gallon, or pre-1824 British gallon.

False Weights and Scales Act 1770 (10 Geo. 3. c. 44)
An Act for more effectually preventing Traders in exciseable Commodities from using false Weights and Scales and for explaining and amending several Acts of Parliament relating to Hackney Coaches and Chairs.

Weights and Measures Act 1795 (35 Geo. 3. c. 102)
An Act for the more effectual Prevention of the Use of defective Weights, and of false and unequal Balances.

Weights and Measures Act 1797 (37 Geo. 3. c. 143)
An Act to explain and amend an Act made in the thirty-fifth Year of the Reign of his present Majesty, intituled, An Act for the more effectual Prevention of the use of defective Weights, and of false and unequal Balances.



19th century


Weights and Measures Act 1815 (55 Geo. 3. c. 43)
An Act for the more effectual Prevention of the Use of false and deficient Measures.

Weights and Measures Act 1824 (5 Geo. 4. c. 74)
An Act for ascertaining and establishing Uniformity of Weights and Measures.

This is the origin of Imperial units. This statute repeals nearly all previous weights and measures legislation, listing them in chronological order (by regnal year but without dates) beginning with "ancient statutes of uncertain date."

Weights and Measures Act 1825 (6 Geo. 4. c. 12)
An Act to prolong the Time of the Commencement of an Act of the last Session of Parliament, for ascertaining and establishing Uniformity of Weights and Measures and to amend the said Act.

Weights and Measures Act 1834 (4 & 5 Will. 4. c. 49)
An Act to amend and render more effectual Two Acts of the Fifth and Sixth Years of the Reign of His late Majesty King George the Fourth, relating to Weights and Measures.

5 & 6 Will. 4. c. 63 (1835)
Also known as the Weights and Measures Act 1835; originally entitled "An Act to repeal an Act of the Fourth and Fifth Year of His present Majesty relating to Weights and Measures, and to make other Provisions instead thereof".
Established the imperial stone and hundredweight of 14 and 112 lbs. respectively, based on the wool stone of Edward III

Weights and Measures Act 1855 (18 & 19 Vict. c. 72)
An Act for legalising and preserving the restored Standards of Weights and Measures.
The 1834 burning of Parliament had destroyed the physical standards referred to in earlier statues; the 1835 act ignored this fact. New copies were created in accordance with the advice of a scientific commission, and the 1855 act made them the "restored Standards".

Weights and Measures Act 1859 (22 & 23 Vict. c. 56)
An Act to amend the Act of the fifth and sixth years of King William the Fourth, chapter sixty-three, relating to weights and measures.

Metric Weights and Measures Act 1864 (27 & 28 Vict. c. 117)
An Act to render permissive the Use of the Metric System of Weights and Measures.

Weights and Measures Act 1878 (41 & 42 Vict. c. 49)
An Act to consolidate the Law relating to Weights and Measures.
This statute abolished the troy pound, effective January 1879.

Weights and Measures Act 1889 (52 & 53 Vict. c. 21)
An Act for amending the Law relating to Weights and Measures and for other purposes connected therewith.

Weights and Measures (Purchase) Act 1892 (55 & 56 Vict. c. 18)

Weights and Measures Act 1893 (56 & 57 Vict. c. 19)

Weights and Measures (Metric System) Act 1897 (60 & 61 Vict. c. 46)
An Act to legalise the Use of Weights and Measures of the Metric System.

Weights and Measures Acts of 1878 to 1893 was the collective title of the following Acts:

Weights and Measures Act 1878 (41 & 42 Vict. c 49)
Weights and Measures Act 1889 (52 & 53 Vict. c 21)
Weights and Measures (Purchase) Act 1892 (55 & 56 Vict. c. 18)
Weights and Measures Act 1893 (56 & 57 Vict. c. 19)



20th century


Weights and Measures Act 1904 (4 Edw. 7. c. 28)

Weights and Measures (Amendment) Act 1926 (16 & 17 Geo. 5. c. 8)

Sale of Food (Weights and Measures) Act 1926 (16 & 17 Geo. 5. c. 63)

Weights and Measures Act 1963 (c. 31)

Weights and Measures etc. Act 1976 (c. 77)

Weights and Measures Act 1979 (c. 45)
This Act introduces the Average Quantity principle for packaged goods into UK law for the first time. The 1979 Act was replaced by Part V of the 1985 Act

Weights and Measures Act 1985 (c. 72)
The Act defines the four primary units of measurement as the metre or the yard (defined in terms of the metre) for length, and the kilogram or pound (defined in terms of the kilogram) for mass. The Act also requires standard physical examples to be maintained (known as "United Kingdom primary standards") for each of the four primary units.
In addition, the definitions of units which are multiples or sub-multiples of the primary units are defined, in terms of the primary units, and given as: mile, foot, inch, kilometre, decimetre, centimetre, millimetre, acre, square yard, square foot, hectare, decare, are, square metre, square decimetre, square centimetre, square millimetre, cubic metre, cubic decimetre, cubic centimetre, hectolitre, litre, decilitre, centilitre, millilitre, gallon, quart, pint, gill, fluid ounce, pound, ounce, ounce troy, tonne, kilogram, hectogram, gram, carat (metric) and milligram.
As originally enacted, the act also defined, in the same way, units which could not be used for trade as: furlong, chain, square mile, rood, square inch, cubic yard, cubic foot, cubic inch, bushel, peck, fluid drachm, minim, ton, hundredweight, cental, quarter, stone, dram, grain, pennyweight, ounce apothecaries, drachm, scruple, metric ton and quintal.
As of January 2020, following multiple amendments over the years since enactment, the metre, yard, kilogram and pound remain as the primary defined units and with the requirement to maintain the "United Kingdom primary standards" for them.
At the same time, all the imperial units, except pint and ounce troy (but including all of those which were originally defined as not to be used for trade) were reclassified as being available for use for trade as supplementary indications, namely: mile, furlong, chain, yard, foot, inch, square mile, acre, rood, square yard, square foot, square inch, cubic yard, cubic foot, cubic inch, bushel, peck, gallon, quart, gill, fluid ounce, fluid drachm, minim, ton, hundredweight, cental, quarter, stone, pound, ounce, dram, grain, pennyweight, ounce apothecaries, drachm, scruple and quintal. The tonne was also reclassified as being available for use for trade as a supplementary unit of measure,




Northern Ireland



Weights and Measures Act (Northern Ireland) 1967

Weights and Measures (Northern Ireland) Order 1981

Weights and Measures (Amendment) Act (Northern Ireland) 2000




See also


Other weights and measures acts




References






External links


Text of the Weights and Measures &c. Act 1976 (c. 77) as in force today (including any amendments) within the United Kingdom, from legislation.gov.uk.
Text of the Weights and Measures Act 1985 (c. 72) as in force today (including any amendments) within the United Kingdom, from legislation.gov.uk.
Confident Consumers – Buying and Selling – Weights and Measures from the Department of Trade and Industry
A Dictionary of Units Originally from Exeter University
Thoburn v Sunderland City Council (2002)
List of English / British monarchs in whose name weights and measures legislation was enacted

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• Weights and Measures Acts (UK)
• Weights and Measures Act
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• List of acts of the Parliament of Great Britain from 1797