# The Trailer Registration Regulations 2018, Paragraph 1: Registration mark - specification


(1) A registration mark must be displayed as a group consisting of one letter and three numbers followed by a group consisting of four numbers (for example A123 4567) in this layout—
(2) This font must be used to display a registration mark—
(3) The characters used to display a registration mark must—
(a) be 64 millimetres in height;
(b) have a width of 44 millimetres, except for the character representing the number “1” and letter “I”, which must have a width of 10 millimetres;
(c) have a stroke width of 10 millimetres; and
(d) be separated by 10 millimetres from any other characters within a group.
(4) A group of characters in a registration mark must be separated from another group of characters in the same registration mark by a space of 5 millimetres vertically.
(5) The width of the margin between the top or lateral edges of the registration plate and any part of a character used to display a registration mark on it must be at least 5 millimetres.
(6) The width of the margin between the bottom edge of the registration plate and any part of a character used to display a registration mark on it must be at least 13 millimetres.
(7) The measurements specified in this paragraph must be made—
(a) in the case of a horizontal spacing requirement, between vertical lines passing through the extreme edges of each character or between the lateral edge of the plate and a vertical line passing through the closest extreme edge of a character to that edge; and
(b) in the case of a vertical spacing requirement, between horizontal lines passing through the extreme edges of each group of characters or between the top or bottom edge of the plate and a horizontal line passing through the closest extreme edge of a character to that edge.
(8) The measurements specified in this paragraph are complied with if—
(a) the height of the character is not more than 1 millimetre more or less than the specified height; and
(b) any other dimension of the character or the space in question is not more than 0.5 millimetres more or less than the specified measurement.

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Source: https://www.legislation.gov.uk/ukdsi/2018/9780111173046/schedule/2/paragraph/1 (the official version)
Page: https://openlegislation.uk/draft-trailer-registration-regulations-2018/schedule-2/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.