Number plates fitted after 1 September 2001 must display characters that meet the dimensions shown below.

Characters
Height	79mm
Width (except the figure 1 or letter l)	50mm
Stroke	14mm
Space between characters	11mm
Space between groups	33mm
Top, bottom and side margins (minimum)	11mm
Space between vertical lines	19mm

The character width has been slightly reduced from 57mm to 50mm to accommodate the Euro-symbol on the number plate.