Number plates fitted before 1 September 2001 must display characters that meet the dimensions shown in one of the two groups below

Characters	Group 1	Group 2
Height	89mm	79mm
Width (except the number 1)	64mm	57mm
Stroke	16mm	14mm
Space between characters	13mm	11mm
Space between groups	38mm	33mm
Side margins (minimum)	13mm	11mm
Space between vertical lines	19mm	19mm