DVLA Number Plate Law

Altered Spacing to Spell Words or Names

One of the most common illegal modifications is changing the spacing between characters to make your registration appear to spell something. For example, a driver with the registration 'BO11 ARD' might space it as 'BO 11ARD' to emphasise a name. This is illegal, even if the registration itself was legitimately purchased from the DVLA.

The spacing rules are non-negotiable: 11mm between individual characters within a group and 33mm between the two groups. Reducing or increasing these gaps to create visual effects renders your plate illegal and can result in a £100 on-the-spot fine.

Using the Wrong Font

Only the Charles Wright 2001 font is permitted on UK number plates. Decorative fonts, stylised lettering, italics, or any variation from this standard makes your plate illegal. Some drivers mistakenly believe that purchasing a private plate gives them freedom over font choice, but this isn't the case. The DVLA controls the assignment of the registration number itself; the display of that number must still meet legal standards.

Tinted or Smoked Number Plates

Tinted number plates have become popular in recent years, but they are not legal in the UK. Tinted or darkened plates reduce reflectivity and make the plates difficult to read under certain conditions, particularly by ANPR cameras used by police and traffic enforcement. UK law mandates that number plates remain clear and legible in all light conditions, and plates must meet British Standards (BS AU 145e) for reflectivity.

Even light tinting can result in an MOT failure and fines of up to £1,000.

Dirty or Obscured Plates

The law is clear: your number plates must be legible at all times. If you let the plates get dirty to the point where authorities can't read them, you could be stopped and fined. While this might seem minor, dirt, mud or snow covering your registration can result in a £1,000 fine, particularly if it appears you've deliberately obscured the plate to avoid detection.

Regular cleaning is essential, especially after driving in adverse weather conditions or through muddy terrain.

Incorrectly Positioned Fixing Bolts

Placing screws or bolts within 10mm of characters can obscure them or confuse ANPR scanning systems. While bolts and screws are legal methods of attachment, they must not obstruct any part of the registration number or interfere with legibility. Adhesive tape or pads are the officially recommended fixing method precisely because they eliminate this risk.

Missing British Standard Mark or Supplier Details

All number plates manufactured and fitted after 1 September 2021 must display the BS AU 145e standard mark in the bottom right corner, along with the supplier's business name and postcode in the centre bottom. Plates lacking these details are essentially "show plates" and are not road legal. This is one of the most common reasons for MOT failures.

4D Plates with Two-Tone Effects

While 3D and 4D raised number plates are legal, two-tone shading effects that were used to create depth have been banned. The characters must be solid black with no gradients, highlighting, or contrast effects. If the raised lettering interferes with visibility or fails to meet reflectivity standards, the plate becomes illegal.

Homemade or DIY Number Plates

Some drivers attempt to make their own number plates or use online templates to print their own. However, to be legal, plates must be manufactured by a DVLA-registered supplier, meet BS AU 145e standards, and be printed onto approved reflective material. Homemade plates almost always fail these requirements and will result in immediate MOT failure and fines.

Ghost Plates and Stealth Modifications

Ghost plates or stealth plates are designed to be hard to detect by speed cameras and ANPR systems. These involve reflective coatings, special films, or altered characters that appear normal to the human eye but confuse automated systems. Using these is illegal and currently carries a £100 fine, though there are growing calls for tougher penalties given their use in avoiding enforcement and toll charges.

DVLA Banned Number Plates: What You Can't Display

The DVLA reviews and bans hundreds of number plate combinations every year to prevent offensive, inappropriate, or misleading registrations from appearing on UK roads. A dedicated panel meets twice annually in Swansea to assess potentially problematic combinations before they're released.

Why Number Plates Get Banned

Number plates are banned if they may cause offence, embarrassment, or are considered to be in poor taste. The DVLA's censorship criteria include:

• Offensive or inappropriate language

• Sexual references

• Racist or discriminatory terms

• Religious insensitivity

• References to illegal activities or drugs

• Violence or terrorism

• Ableist slurs

• Politically sensitive content

• Current affairs that could cause controversy

Recent Banned Combinations

For the '25' series released in March 2025, the DVLA banned 210 number plate combinations. The number '25' created unique challenges, as when combined with certain letters, it can create unintended words or phrases. Examples included:

• 25 HAG, 25 HAT, 25 LAG, 25 LUT, **25 TAB (ableist or rude implications)

• 25 RUS, 25 UKR (references to the Russia-Ukraine conflict)

• AR25 WAR, EU25 WAR, GB25 WAR, GO25 WAR (war references)

• GB25 BAD, GB25 BOM, GB25 KLL, GB25 SHT (anti-British sentiment or violence)

• TE25 ROR, ST25 ABB (terrorism or violence references)

• TO25 ERR, AS25 HOL (unintended offensive meanings)

• BA25 ARD (can be interpreted inappropriately)

For the '26' series (to be released in March 2026), the DVLA has withheld 403 character combinations, though the use of wildcard characters means the actual number of banned plates is considerably higher. For example, *B26 OMB indicates that all registrations ending in B26 OMB are banned, regardless of which character appears first.

In 2024, over 300 number plates were banned, including combinations referencing COVID-19, Brexit, and the Ukraine conflict. Plates like 'GB24 WAR' and 'EU24 UKR' were deemed inappropriate due to their potential to cause controversy.

How Banned Plates Are Identified

The DVLA uses special software to catch potentially offensive combinations that might slip through manual review. Even subtle combinations are scrutinised. The interpretation can sometimes require guesswork: GB25 DWN might seem meaningless until you notice similar banned plates like GB25 BAD, GB25 BOM, GB25 KLL, and GB25 WAR, suggesting the DVLA interpreted it as anti-British sentiment.

Certain prefixes are also banned wholesale if they can be used to make inappropriate words or sentences across multiple combinations.

What Happens If You Own a Banned Plate

If the DVLA bans a number plate that you already own and have legitimately purchased, your registration becomes illegal. You cannot display it on any vehicle, and in severe cases, the DVLA may permanently withdraw the registration number without compensation.

This is why it's essential to consider not just current acceptability but potential future sensitivities when purchasing personalised registrations.

Penalties for Number Plate Violations

The consequences for displaying illegal number plates are serious and can affect your ability to drive legally.

Fixed Penalty Notices

The most common penalty for an illegal number plate is a Fixed Penalty Notice of £100 per offence. No penalty points are typically added to your licence, but police can issue the fine immediately during a roadside stop for:

• Incorrect spacing

• Illegal fonts or stylised characters

• Missing BS AU 145e marking

• Incorrect plate size or layout

• Use of non-compliant materials

• Tinted or obscured plates

You can be fined multiple times for the same vehicle if the issue is not corrected.

MOT Failure

Any number plate that is incorrectly spaced, uses the wrong font, is too small, tinted, damaged, or non-reflective will result in an immediate MOT failure. This means you cannot legally drive the vehicle on public roads until the plates are replaced with compliant versions.

The MOT test specifically checks whether the registration plate is present, secure, legible, and in the correct format. Even slight deviations from the standard can trigger a failure.

Registration Withdrawal

In severe cases, the DVLA may permanently withdraw your vehicle's registration number without compensation. This is most likely to occur if:

• The plate deliberately misrepresents the vehicle's age

• The plate is deemed offensive or inappropriate

• There's evidence of deliberate tampering to avoid detection

• The registration is being used fraudulently

Insurance Implications

Using illegal number plates could potentially invalidate your car insurance. Insurers may argue non-disclosure or unauthorised vehicle modification, which could affect claims or policy validity. This is particularly relevant if the illegal plates were involved in an incident.

Police Powers

Police have the authority to remove vehicles from the road until illegal plates are corrected. They can also confiscate non-compliant plates on the spot. For repeat offenders or serious violations, prosecution beyond a fixed penalty may be pursued.

How to Ensure Your Number Plates Stay Legal

Avoiding number plate violations is straightforward if you follow these essential steps:

Always Use a DVLA-Registered Supplier

Only purchase number plates from suppliers registered with the DVLA on the Register of Number Plate Suppliers (RNPS). Registered suppliers are legally obligated to ensure plates meet British Standards and DVLA regulations.

When purchasing from National Numbers, you're buying from the UK's oldest number plate manufacturer (our parent company, Jepson & Co Ltd), ensuring full compliance with all regulations.

Provide Proper Documentation

Registered suppliers will request proof of identity and proof that the registration number belongs to you before making your plates. This is a legal requirement, not bureaucracy. Never use a supplier who doesn't ask for these documents.

Check Your Plates Meet BS AU 145e

Look for the BS AU 145e mark in the bottom right corner of plates fitted after 1 September 2021 (or BS AU 145d for plates from 1 September 1973 to 1 September 2021). This confirms the plate meets current British Standards for durability, visibility, and reflectivity.

Inspect Spacing and Font

Before fitting new plates, check that:

• Characters are 79mm tall and 50mm wide (except the number 1 or letter I)

• Spacing between characters is 11mm

• Spacing between groups is 33mm

• The Charles Wright 2001 font is used throughout

• Characters are solid black with no two-tone effects

Regular Maintenance

Clean your number plates regularly, especially after driving in adverse weather. Check for cracks, peeling, fading, or damage that could affect legibility. Replace damaged plates immediately rather than waiting for your MOT.

Avoid Modification

Don't attempt to:

• Alter spacing to create words or names

• Use coloured screws or bolts within 10mm of characters

• Apply any films, sprays, or coatings

• Reposition characters

• Add stickers, patterns, or backgrounds

• Use unofficial flags or symbols

Before Your MOT

Conduct a visual check of your number plates in daylight from a normal viewing distance. If characters are cracked, peeling, faded, obscured by dirt, bent by impact, or drilled through, replace the plate before your test.

With over 73 million possible combinations and 40 years of experience in the private number plate industry, National Numbers makes it easy to find the perfect registration for your vehicle. All our physical number plates are manufactured to DVLA standards by Jepson & Co Ltd, the UK's oldest number plate manufacturer, ensuring full legal compliance. Ready to find your ideal number plate? Call us on 01642 363738 or visit nationalnumbers.co.uk to browse our extensive database today.

And that’s about it! Again, if you’re after any more information, particularly on number plate formats, you can read all about them in our format guide, or visit the DVLA website.