There is exactly one legal typeface for a UK number plate, and it has a name: Charles Wright 2001. Every italic, slanted, condensed or decorative font you have seen on the road is an offence waiting to be noticed. Here is how the font rules work and what the prescribed dimensions actually are.
Where the font came from
The original Charles Wright typeface dates back to 1935. The version in use today is a lightly modified revision adopted in 2001, adjusted specifically to improve reliability for automatic number plate recognition cameras. That is why the legal font is always referred to with the year attached.
The design priorities are unglamorous but sensible. Characters need to be distinguishable from each other at distance, in motion, in poor light. A camera has to tell an 8 from a B and a 0 from a D without hesitating.
The prescribed character sizes
The font is only half the rule. Character dimensions and spacing are prescribed too. For most cars and vans:
- Character height: 79mm
- Character width: 50mm, except the figure 1 and the letter I
- Stroke width: 14mm
- Space between characters: 11mm
- Space between the two groups of characters: 33mm
- Margin around the edge: 11mm minimum
Motorcycles, and vehicles required to display smaller plates, use a reduced set:
- Character height: 64mm
- Character width: 44mm
- Stroke width: 10mm
- Space between characters: 10mm
- Space between groups: 30mm
- Margin: 11mm minimum
Fonts and effects that are not legal
- Italic or slanted characters. Sometimes sold as a sporty look. Not legal.
- Condensed or narrowed characters. Used to squeeze a long registration onto a short plate. Not legal, and a common MOT failure on imports.
- Script or decorative fonts. Never legal on the road.
- Shadow and two tone fonts. Banned since the single solid black rule came in with BS AU 145e.
- Outline or hollow characters. Not solid black, not legal.
Why people break the font rules by accident
The most common cause is a plate that does not fit. Imported vehicles often have a recess sized for a square or narrow European plate, and the temptation is to squash the characters to fit. That is illegal even though the registration still reads correctly.
The correct fix is a different plate size, not a different font. Standard UK oblong plates measure 520mm by 111mm, and square and short plates exist precisely so that characters can stay at legal dimensions. If you are unsure what fits your vehicle, ask us before ordering.
Does 4D or 3D change the font rules?
No. Raised characters must still be Charles Wright 2001 at the prescribed height, width, stroke and spacing. Depth is added on top of a compliant character shape, not instead of it. Every plate in our 4D range and 3D gel range uses the legal font and dimensions.
Penalties
An incorrect font or altered character size can bring a fine of up to £1,000 and will fail an MOT. Because the fault is visible from outside the vehicle, it is one of the easiest plate offences for an officer to spot.
Frequently asked questions
Do the font rules apply to show plates?
Show plates are display items sold for exhibition and collection use, so the road font rules do not govern them. They are not road legal and must not be fitted to a vehicle used on a public road.
Is the 1 and I really a different width?
Yes, those characters are narrower than the standard 50mm width, which is why registrations containing them look slightly different in spacing.
My imported car has a small recess. What are my options?
Fit a square or shorter plate at the legal character size, or use an adapter or plate holder. Do not shrink the characters.
Do flags and borders affect the font rules?
No, but they must not encroach on the required margins or obscure characters.
Correct by default
Every road legal plate we make uses Charles Wright 2001 at the prescribed dimensions, so you do not have to think about any of it. Browse our standard plates or explore the 5D range.