# The Explosives Act 1875 etc. (Metrication and Miscellaneous Amendment) Regulations 1984, Schedule 1: AMENDMENTS TO PROVISIONS


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Provisions to be amended
Subject-matter of measurement
Present measurement
Substituted measurement
EXPLOSIVES ACT 1875
Parts I , II and III
Section 5: (proviso (1))
Maximum amount of gunpowder to which the section does not apply, if kept for private use and not for sale
thirty pounds
15 kilograms
Section 7
Area for service of notice on local and harbour authorities
one mile
1.6 kilometres
Section 16(3)
Maximum amount of gunpowder to be kept in certain stores
two tons
2,000 kilograms
Section 17: General Rule No. (5)
Amount of gunpowder below which stores need not have a lightning conductor
one thousand pounds
500 kilograms
Section 22: General Rule No. (2)(a)
Maximum amount of gunpowder allowed in certain registered premises
two hundred pounds
100 kilograms
Section 22: General Rule No. (2)(b)
Maximum amount of gunpowder allowed in other registered premises—
fifty pounds
25 kilograms
but if in fire-proof safe
one hundred pounds
50 kilograms
Section 22: General Rule No. (5)
Amount above which gunpowder shall be kept in a substantial receptacle
one pound
500 grams
Section 24
Designated area deemed to be part of a building
twenty yards
20 metres
Additional quantity of gunpowder allowed in a factory under certain conditions
ten hundred weight
500 kilograms
Section 32
Amount above which gunpowder shall be sold in a substantial receptacle
one pound
500 grams
Section 46: regulation (1)
Maximum amount of gunpowder allowed in cartridge filling room
five pounds
2 kilograms
Section 47: regulation (1)
Maximum amount of gunpowder allowed in certain workshops
one hundred pounds
50 kilograms
Section 48: paragraph (a)
Maximum amount of explosive allowed in small firework factory
one hundred pounds
50 kilograms
Section 48: paragraph (b)
Maximum amount of manufactured fireworks allowed in small firework factory
five hundred pounds
250 kilograms
Section 48: paragraph (c)
Maximum amount of coloured fires or stars allowed in small firework factory
twenty-five pounds
12 kilograms
Section 63
Amount of gunpowder above which a related accident is notifiable in certain cases
half a ton
500 kilograms
First Schedule: Part One
Regulation (1)
Maximum quantity of gunpowder allowed under mill stones in certain circumstances at one time
fifty pounds
25 kilograms
sixty pounds
30 kilograms
Regulation (2)
Maximum quantity of gunpowder allowed to under press at one time
ten hundred weight
500 kilograms
Regulation (3)
Maximum quantity of gunpowder allowed to be granulated at one time
twelve hundred weight
600 kilograms
Regulation (4)
Maximum quantity of gunpowder allowed to be dried at one time
fifty hundred weight
2,500 kilograms
Regulation (5)
Minimum distance between press houses etc. and expense magazines
forty yards
35 metres
Regulation (6)
Minimum distance between mill and factory magazine
one hundred and forty yards
125 metres
Regulation (7)
Minimum distance for charcoal from a mill, press or magazine
20 yards
20 metres
First Schedule : Part Two
Regulation (2)
Maximum amount of gunpowder allowed in a well constructed store
four thousand pounds
2,000 kilograms
Maximum amount of gunpowder allowed in other stores
three hundred pounds
150 kilograms
Regulation (3)
Amount of gunpowder in certain stores
three hundred pounds
150 kilograms
Distance within which store shall be from mine, quarry, etc.
two hundred yards
180 metres
Minimum distance from house of store
two hundred yards
180 metres
Regulation (5)
Amount of gunpowder in certain stores
three hundred pounds
150 kilograms
Distance within which store shall be from mine, quarry etc.
two hundred yards
180 metres
Minimum distance from house of store
two hundred yards
180 metres
Regulation (6)
Minimum distance from the City of London or Westminster of store
three miles
5 kilometres
Minimum distance from borough or market town of store
one mile
1.6 kilometres
Minimum distance from Royal residence of store
two miles
3 kilometres
Minimum distance from Crown magazine of store
two miles
3 kilometres
Minimum distance from parish church of store
half a mile
800 metres
Order in Council (No. 1) Classifying Explosives
Class 7 (proviso)
Maximum quantity of coloured fire composition in deemed “manufactured firework”
one pound
500 grams
Order in Council (No. 3) relating to Magazines for Explosives other than Gunpowder, whether with or without Gunpowder
Part II
Maximum amount of gunpowder allowed in cartridge filling room (all references)
5 lbs.
2 kilograms
Maximum amount of other explosive allowed in cartridge filling room
5 lbs.
2 kilograms
Part III
Maximum amount of gunpowder allowed in workshop (all references)
100 lbs.
50 kilograms
Maximum amount of other explosive allowed in workshop
100 lbs.
50 kilograms
Order in Council (No. 4) relating to Small Firework Factories
Part II
Preamble: paragraph 3
Maximum amount of gunpowder to be kept in stores
two tons
2,000 kilograms
Article 4
Minimum distance of danger building from other buildings
25 yards
25 metres
Provisos to Article 4
Reduced distance for screened and protected building
12 yards
12 metres
Exception for certain magazines
25 yards
25 metres
Article 6
Distance, greater than which, a factory of Division A shall be from—
works of Class 1
25 yards
25 metres
works of Class 2
50 yards
50 metres
works of Class 3
¼ mile
400 metres
Royal residences
½ mile
800 metres
Distance, greater than which, a factory of Division B shall be from—
works of Class 1
50 yards
50 metres
works of Class 2
100 yards
100 metres
works of Class 3
½ mile
800 metres
Royal residences
1 mile
1.6 kilometres
Article 7
Maximum quantities in a factory of Division A of—
explosives
50 lbs.
25 kilograms
coloured fires or stars
25 lbs.
12 kilograms
manufactured fireworks
150 lbs.
75 kilograms
Maximum quantities in a factory of Division B of—
explosives
100 lbs.
50 kilograms
coloured fires or stars
25 lbs.
12 kilograms
manufactured fireworks
500 lbs.
250 kilograms
Part III
General Rule No. 6
Minimum distance between fire and danger building
25 yards
25 metres
Reduced distance for screened and protected building
12 yards
12 metres
General Rule No. 20
Maximum quantities in a danger building of—
explosives
25 lbs.
12 kilograms
manufactured fireworks
50 lbs.
25 kilograms
manufactured fireworks during packing
100 lbs.
50 kilograms
Order in Council (No. 6) relating to Stores Licensed for Mixed Explosives
Part I
Preamble: paragraph 3
Maximum amount of gunpowder to be kept in stores
two tons
2,000 kilograms
Article 3(2)(a)
Distance in excess of which store of Division A shall be from—
works of Class 1
75 feet
23 metres
works of Class 2
85 feet
26 metres
Article 3(2)(b)
Distance in excess of which store of Division B shall be from—
works of Class 1
75 feet
23 metres
works of Class 2
130 feet
40 metres
Article 3(2)(c)
Distance in excess of which store of Division C shall be from—
works of Class 1
146 feet
45 metres
works of Class 2
292 feet
89 metres
Article 3(2)(d)
Distance in excess of which store of Division D shall be from—
works of Class 1
230 feet
70 metres
works of Class 2
460 feet
140 metres
Article 3(2)(e)
Distance in excess of which store of Division E shall be from—
works of Class 1
352 feet
110 metres
works of Class 2
704 feet
215 metres
Proviso (i) to Article 3(2)
Exempted workshops not regarded as protected works—
maximum quantity of explosive
100 lb.
50 kilograms
distance in excess of which the workshop is from store etc.
75 feet
23 metres
Proviso (ii) to Article 3(2)
Railways not regarded as protected works—
minimum distance from store
75 feet
23 metres
distance within which locomotive is from store
150 feet
46 metres
Proviso (iii) to Article 3(2)
Minimum thickness of earth mound screening store
3 feet
1 metres
Article 3(4)
Maximum quantity permitted in Division A store—
(a) general explosive
150 lb.
75 kilograms
(b) certain ammunition
700 lb.
320 kilograms
Article 3(5)
Maximum quantity permitted in Division B store—
(a) general explosive
300 lb.
150 kilograms
(b) certain ammunition
4,000 lb.
1,800 kilograms
Article 3(6)
Maximum quantity permitted in Division C store—
(a) general explosive
1,000 lb.
450 kilograms
(b) certain ammunition
20,000 lb.
9,000 kilograms
Article 3(7)
Maximum quantity permitted in Division D store—
(a) general explosive
2,000 lb.
900 kilograms
(b) certain ammunition
20,000 lb.
9,000 kilograms
Article 3(8)
Maximum quantity permitted in Division E store—
(a) general explosive
4,000 lb.
1,800 kilograms
(b) certain ammunition
20,000 lb.
9,000 kilograms
Article 3(9)
Ratio of reduction in quantity of general explosive to
pound
kilogram
permitted additional quantity of fireworks
4 lb.
4 kilograms
Article 5
Distance between store and workshop
75 feet
25 metres
Part III
Maximum amount of gunpowder allowed in cartridge filling room (all references)
5 lbs.
2 kilograms
Maximum amount of other explosive allowed in cartridge filling room
5 lbs.
2 kilograms
Part IV
Maximum amount of gunpowder allowed in workshop (all references)
100 lbs.
50 kilograms
Maximum amount of other explosive allowed in workshop
100 lb.
50 kilograms
Order in Council (No. 9) relating to the Sale of Explosive
Preamble
Amount above which gunpowder must be sold in a substantial receptacle
1 lb.
500 grams
Article 1
Maximum amount of other explosive which may be sold if not in a substantial receptacle
1 lb.
500 grams
Proviso (a) to Article 1
Maximum amount of gunpowder etc. in an amount of explosive of Class 6 Division 1 which may be sold if not in a substantial receptacle
5 lbs.
2 kilograms
Proviso (b) to Article 1
Maximum amount of explosive of Class 7 Division 2 which may be sold if not in a substantial receptacle
5 lbs.
2 kilograms
Order in Council (No. 11) respecting Notice to be given of Accidents connected with the Conveyance of Explosives other than Gunpowder
Amount of gunpowder above which a related accident is notifiable in certain cases
half a ton
500 kilograms
Amount of other explosive above which a related accident is notifiable in certain cases
200 lbs.
100 kilograms
Order in Council (No. 12 to replace No. 8) relating to the Keeping of Explosive for Private Use and not for Sale
Preamble
Maximum amount of gunpowder for private use
30 lbs.
15 kilograms
Article (2)(a)
Maximum amount of gunpowder in small arms cartridges to which exception applies
five pounds
2 kilograms
Article (2)(c)
Maximum amount of fireworks to which exception applies in certain cases
five pounds
2 kilograms
Article (3)(a)
Maximum amount of explosive which may be specified in certificate
ten pounds
5 kilograms
Schedule
Maximum amount of explosive specified in certificate
ten pounds
5 kilograms
Order in Council (No. 16) repealing and consolidating the previous Orders relating to Premises registered for Mixed Explosives
Part I
General Rule No. 2(5)
Amount above which certain explosives must be kept in closed bag or case
1 lb.
500 grams
Amount of certain explosives above which packages may not be opened on registered premises
1 lb.
500 grams
Maximum amount of certain explosives which a package opened for immediate use may contain
5 lbs.
2 kilograms
Part IV
Maximum amount of gunpowder in cartridge filling room (all references)
5 lbs.
2 kilograms
Maximum amount of small-arm nitro-compound in cartridge filling room
5 lbs.
2 kilograms
Order in Council (No. 16A) varying the Order in Council (No. 16) of October 26 1896, relating to Premises registered for Mixed Explosives
Preamble
Maximum quantity of fireworks, Mode A
200 lbs.
100 kilograms
Maximum quantity of fireworks, Mode B
50 lbs.
25 kilograms
Article 1
Maximum weight for “Shop Goods” Mines, Jack-in-the-boxes and Feu de Joie
2 lbs.
1 kilogram
Maximum weight for “Shop Goods” Maroons
4 ozs.
100 grams
Maximum length for “Shop Goods” Chinese Crackers
4 inches
100 millimetres
Article 2
Ratio of “Shop Goods” to
two pounds (2 lbs.)
2 kilograms
manufactured fireworks
one pound (1 lb.)
1 kilogram
Order in Council (No. 26) relating to Picric Acid, Picrates and Mixtures of Picric Acid with other Substances
Article 2(b)
Maximum quantity of picric acid not deemed to be an explosive
1 lb.
500 grams
Order in Council (No. 27) (The Explosives (Di-nitro-phenol and Di-nitro-phenolate) Order 1927)
Article 2(c)
Maximum quantity of di-nitro-phenol to which the Order does not apply
5 lb.
2 kilograms
Order in Council (No. 28) (The Sale of Explosives Order 1928)
Article 3
Amount of explosive which must be exceeded in a certificate of a Chief Officer of Police
ten pounds
5 kilograms
Order in Council (No. 30) prohibiting the Manufacture, Importation, Keeping, Conveyance or Sale of Acetylene when an Explosive as defined by the Order
First provision
Pressure above which acetylene is deemed to be an explosive
nine pounds to the square inch
620 millibars
Proviso (1)(a)
Maximum pressure of acetylene used in the production of organic compounds
{three hundred pounds per square inch
21 bars
{twenty-two pounds per square inch
1.5 bars
Proviso (1)(b)
Maximum pressure of acetylene in any other case
twenty-two pounds to the square inch
1.5 bars
Order of Secretary of State (No. 5), dated March 28 1898, relating to Compressed Acetylene in Admixture with Oil-Gas
Maximum pressure at which acetylene in admixture with oil-gas is deemed not to be an explosive
one hundred and fifty pounds to the square inch
10 bars
Order of Secretary of State (No. 5A), dated September 29 1905, relating to Compressed Acetylene in Admixture with Oil-Gas
Condition 4
Maximum pressure at which acetylene in admixture with oil-gas is deemed not to be an explosive
one hundred and fifty pounds per square inch
10 bars
Order of Secretary of State (No. 9), dated June 23 1919, relating to Compressed Acetylene contained in a Porous Substance
Condition (6)
Maximum pressure in a cylinder of acetylene
two hundred and twenty-five pounds to the square inch
15.5 bars
Related temperature
sixty degrees Fahrenheit
15 degrees Celsius
Proviso to condition (6)
Volume of certain cylinders
one cubic foot
30 litres
Maximum pressure to which such cylinders may be charged
one hundred and fifty pounds to the square inch
10 bars
Related temperature
sixty degrees Fahrenheit
15 degrees Celsius
Condition (7)
Volume of certain cylinders
one cubic foot
30 litres
Maximum pressure allowed in such cylinders
two hundred and twenty-five pounds to the square inch
15.5 bars
Condition (11)
Volume of cylinders required to have certain markings
one cubic foot
30 litres
Order of Secretary of State (No. 11), dated September 20 1924), making Byelaws as to the Conveyance of Explosives on Roads and in certain special cases
Byelaw 1
Amount below which explosive may be conveyed in a passenger-carrying carriage or boat
5 lbs.
2 kilograms
Byelaw 2: paragraph (a) of the proviso
Minimum space between case and outer package of detonators
three inches
75 millimetres
Byelaw 2: paragraph (b) of the proviso
Minimum thickness of soft material for outer packages of electric detonators
half an inch
13 millimetres
Byelaw 4
Quantity of certain explosives above which byelaw applies
5 lbs.
2 kilograms
Byelaw 4; regulation (k)
Maximum quantity of explosive which may be carried with flammables etc.
50 lbs.
25 kilograms
Byelaw 4; regulation (l)
Quantity of explosive above which delay in conveyance is not allowed
100 lbs.
50 kilograms
Byelaw 4: regulation (m)
Quantity of explosive above which precautions must be taken against the introduction of fire-producing objects etc.
100 lbs.
50 kilograms
Byelaw 4 : regulation (n)
Quantity of explosive above which personnel must be acquainted with byelaws
100 lbs.
50 kilograms
Byelaw 4: regulation (o)
Quantity of explosive which when exceeded during conveyance in towns and villages must be attended by a competent person
100 lbs.
50 kilograms
Quantity of explosive which when exceeded elsewhere must be attended by a competent person
1,000 lbs.
500 kilograms
Byelaw 4: regulation (p)
Maximum quantity of explosive to be conveyed in a carriage or boat with unprotected stowage
2,000 lbs.
1 tonne
Maximum quantity of explosive to be conveyed on a private railway in an enclosed carriage
16,000 lbs.
8 tonnes
Maximum quantity of explosive to be conveyed in any one boat with a close deck
50,000 lbs.
25 tonnes
Maximum calibre of quick firing ammunition
3-inch
77 millimetres
Limit that may be exceeded by non-communicating explosives
2,000 lbs.
1 tonne
Maximum quantity of non-communicating explosives allowed in one carriage
10,000 lbs.
5 tonnes
Byelaw 4: regulation (q)
Minimum distance between carriages or boats containing explosive
50 yards
50 metres
The Control of Explosives Order 1953
Schedule
Quantity of gunpowder specified in licence and the endorsement thereon
pounds
kilograms
Quantity of safety-fuze specified in licence and the endorsement thereon
pounds
kilograms
The Keeping of Fireworks Order 1959
Article 3(2)
Quantity of fireworks kept in Mode B above which a closed metal container shall be used
one hundred pounds
50 kilograms
Maximum quantity of fireworks to be kept in any one container
one hundred pounds
50 kilograms
Schedule
Maximum quantity of “Shop Goods”—Mode A
2,000 lbs.
1,000 kilograms
Maximum quantity of explosive of Class 6 Division 1—Mode A
500 lbs.
250 kilograms
Maximum quantity of “Shop Goods”—Mode B
500 lbs.
250 kilograms
Maximum quantity of explosive of Class 6 Division 1—Mode B
500 lbs.
250 kilograms
Maximum quantity of explosives in room to which the public have access etc.
100 lbs.
50 kilograms

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Source: https://www.legislation.gov.uk/uksi/1984/510/schedule/1 (the official version)
Page: https://openlegislation.uk/explosives-act-1875-etc-metrication-and-miscellaneous-amendment-regulations-1984/schedule-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.