UK Number Plate Display Rules

A private registration only stays yours if it is displayed legally. Number plates in the UK must meet a British Standard and the DVLA's display rules, and altering the spacing or font of a registration to spell a word can lead to a fine, an MOT failure or the registration being taken away. This guide sets out the rules in plain English.

What must a UK number plate have?

According to the DVLA's display rules, number plates must:

be made from reflective material;
show black characters on a white plate at the front and a yellow plate at the back;
have no background pattern;
have characters that are not removable and not reflective;
carry the supplier's mark and the British Standard number; and
if fitted on or after 1 September 2021, meet BS AU 145e and use characters in a single shade of black.

Plates must also use the standard number plate font, and only a registered number plate supplier can make them. You will need to show proof of identity and that you are entitled to the registration when you order.

What spacing and sizes are required?

On a standard car plate, characters are 79mm tall and 50mm wide (except the number 1 and the letter I), with 11mm between characters and 33mm between the two groups. The gap between groups must stay where the registration's format puts it.

Moving the gap, adding extra gaps, or using screws, bolts or stylised fonts to make characters look like other letters is misrepresenting the registration. For example, S4 RAH must be displayed exactly as issued, not as SA RAH or S ARAH, and a screw must not be used to turn the 4 into an A. Misrepresentation is the most common way private registration owners break the rules.

What extras are allowed?

Number plates may also:

have raised (3D) characters, provided they meet the standard and are a single shade of black;
display certain national flags and identifiers on the left-hand side; and
display a green flash on the left-hand side if the vehicle is zero-emission.

Are 3D gel and 4D plates legal?

Raised characters are permitted if the plate meets BS AU 145e, the characters are a single, solid shade of black and the plate has all the required markings. Plates whose characters have tinted, two-tone, clear or shadow-effect edges, or that otherwise do not meet the standard, are not legal on the road. Changes to the standard have been discussed, so buy from a registered supplier and check the current position before ordering.

What about show plates?

Plates with non-standard fonts, spacing or backgrounds are sometimes sold as "show plates". They are only for off-road use, such as car shows. They are not legal on a vehicle used on public roads.

What are the penalties?

A fine of up to £1,000 for displaying an incorrect or misrepresented number plate.
An MOT failure, because number plates are checked as part of the test.
Withdrawal of the registration. The DVLA can permanently withdraw a private registration that is misrepresented. You would not get back the money you paid for it.

For a valuable registration, the last point matters most: an illegally spaced plate risks the whole value of the registration, not just a fine.

Do the same rules apply to motorcycles?

Motorcycles only need a rear plate. It must follow the same standard and is usually laid out on two lines.

Frequently asked questions

Can I use a different font if it looks similar?

No. Only the standard number plate font is permitted on plates used on the road.

Can I add a dealer logo or my own badge?

Only the permitted flags, identifiers and green flash may be shown on the plate itself, alongside the supplier and British Standard markings.

Are older plates fitted before September 2021 still legal?

Plates fitted before 1 September 2021 must meet the standard that applied when they were made. Any replacement plates must meet BS AU 145e.

Where can I check a registration's history?

Search any registration on its Timeline to see documented sales, vehicles and adverts.