14/05/2006
Understanding MOT Number Plate Guidelines
The MOT test is a crucial annual check to ensure your vehicle is roadworthy and meets environmental standards. While many people focus on the mechanical aspects like brakes and emissions, a surprisingly common reason for MOT failure is related to the vehicle's number plates. These seemingly simple pieces of metal or plastic are subject to strict regulations to ensure they are clearly visible and legible for identification purposes. Failing to adhere to these guidelines can lead to an unsuccessful MOT and the need for costly re-testing. This article will delve into the specifics of MOT number plate compliance, covering everything from the legal requirements for their construction and display to common pitfalls to avoid.

Legal Requirements for Number Plates
The legal requirements for number plates in the UK are set out by the DVLA (Driver and Vehicle Licensing Agency) and are primarily governed by the Road Vehicles (Display of Registration Marks) Regulations 2001. These regulations dictate the size, colour, font, spacing, and even the materials used for your vehicle's registration plates.
1. Size and Dimensions
Standard number plates have specific dimensions to ensure they are easily readable. For most vehicles (cars and light commercial vehicles), the standard size is 520mm x 111mm (20.5 inches x 4.4 inches). Motorcycles and smaller vehicles may have different, smaller plate size requirements, but the principle of clear visibility remains paramount.
2. Font and Characters
The characters on your number plate must be in a specific font known as 'Charles Wright'. This font is designed for maximum readability with a specific style for each letter and number, including distinct shapes for characters like '1' and 'I', or '0' and 'O'. The characters must be 65mm high, 50mm wide (except for '1' and 'I' which are 35mm wide), and the stroke width of each character must be 10mm. There should also be a 10mm gap between characters.
3. Spacing
The spacing between characters is also regulated. As mentioned, there should be a 10mm gap between characters within a group (e.g., between 'AB' and '12'). The gap between the UK identifier (if present) and the first character, and between the last character and the second group of characters, should be 30mm. The gap between the two groups of characters (e.g., between 'AB12' and '345') must be 100mm.
4. Colour and Material
Front number plates must be white with black characters. Rear number plates must be yellow with black characters. The characters must be raised (3D effect) or flat. There are specific requirements for the reflectivity of the plates, ensuring they are visible in low light conditions. Plates must also be made from a material that is resistant to fading and damage. It is illegal to have coloured characters or backgrounds, or to use any form of embellishment that obscures the characters.
5. UK Identifier and Badges
If you display a UK identifier (e.g., 'UK' with the Union Flag), it must be positioned on the left-hand side of the plate. Other national identifiers like 'GB' are no longer permitted for vehicles travelling in the EU. Some plates may also display the Euro-symbol and 'GB' on a blue background, but this is only permitted if the plate was fitted before 1 January 2021. Any additional badges or stickers, such as those for the London Low Emission Zone (LEZ) or Ultra Low Emission Zone (ULEZ), must not obscure the registration number.
During an MOT test, the examiner will check your number plates for several key issues. Being aware of these common failure points can save you time and money:
- Illegible Characters: This is the most frequent cause of failure. It can be due to faded characters, dirt or mud obscuring the plate, damage to the plate itself (cracks, bends), or the use of incorrect font or spacing.
- Incorrect Size or Shape: If your plates are not the standard size or have been cut down or modified in any way, they will likely fail.
- Non-Standard Colours: Any deviation from the standard white (front) and yellow (rear) with black characters will result in failure. This includes coloured surrounds, illuminated characters, or tinted plates.
- Missing Plates: Both front and rear number plates must be fitted and securely attached.
- Obscured Plates: Anything that covers or obscures the registration number, such as dirt, mud, snow, tow-bar attachments, or even certain types of bike racks, can lead to a failure.
- Incorrectly Fitted Plates: Plates must be fitted to the vehicle in the prescribed positions and angles. A plate that is significantly bent or twisted can be deemed illegible.
Ensuring Your Number Plates Comply
It's relatively straightforward to ensure your number plates are compliant. Here’s a checklist:
- Check the Font: Ensure the characters are in the correct 'Charles Wright' font with the proper stroke width and spacing.
- Verify Dimensions: Confirm your plates are the standard size for your vehicle type.
- Inspect for Damage: Look for any cracks, fading, or damage that could make characters illegible.
- Keep Them Clean: Regularly clean your number plates to remove dirt, mud, or snow.
- Secure Attachment: Make sure both plates are securely fastened to the vehicle.
- Correct Colours: Ensure the front plate is white and the rear plate is yellow, with black characters.
- No Obscurements: Ensure nothing is covering or obscuring the registration number.
Where to Get Compliant Number Plates
It's important to purchase your number plates from a reputable supplier who is registered with the DVLA. These suppliers are legally required to check your proof of identity and entitlement to the registration number before they can manufacture and supply the plates. You can find a list of registered suppliers on the GOV.UK website. Avoid purchasing from unofficial sources, as the plates may not meet legal standards and could lead to MOT failure.
Consequences of Non-Compliance
Driving with non-compliant number plates is not only a reason for MOT failure but is also a legal offence. You can receive a £100 fine for each plate that does not meet the requirements. If the plates are deemed to be deliberately obscured or altered to be misleading, the penalties can be more severe, including a potential driving ban and the registration number being withdrawn. The maximum penalty for the latter is a fine of £1,000.
Table: Number Plate Requirements at a Glance
| Feature | Requirement |
|---|---|
| Front Plate Colour | White |
| Rear Plate Colour | Yellow |
| Character Colour | Black |
| Font | Charles Wright |
| Character Height | 65mm |
| Character Width | 50mm (except '1'/'I' at 35mm) |
| Stroke Width | 10mm |
| Space Between Characters | 10mm |
| Space Between Groups | 100mm |
| UK Identifier Position | Left side |
Frequently Asked Questions (FAQs)
Q1: Can I have personalised number plates for my MOT?
Yes, as long as your personalised number plates meet all the legal requirements for font, size, spacing, and colour. The 'show plates' that have custom fonts or colours will not pass an MOT.
Q2: What if my number plate is slightly damaged but still readable?
Even minor damage that affects the legibility of any character, or the integrity of the plate itself, can lead to an MOT failure. It's best to replace any damaged plates proactively.
Q3: Can I use a different font if it looks similar to Charles Wright?
No. The regulations specify the 'Charles Wright' font precisely. Using a similar but non-compliant font will result in failure.
Q4: My tow bar partially obscures the rear number plate. Will this fail my MOT?
Yes, if the tow bar or any other attachment obscures any part of the number plate, making it less legible, it will fail the MOT. Ensure your tow bar does not obstruct the plate, or consider removing it for the test if necessary.
Q5: Are black and silver number plates legal?
Black and silver number plates were the standard before 1973. They are legal for vehicles registered before 1 January 1973. For all vehicles registered after this date, they are illegal and will not pass an MOT.
Conclusion
Maintaining your vehicle's number plates in accordance with the DVLA's regulations is a straightforward but essential part of MOT preparation. By understanding and adhering to the rules regarding size, font, spacing, colour, and general condition, you can ensure your vehicle passes its MOT test without any unnecessary complications. Regular checks and prompt replacement of damaged or non-compliant plates will not only keep you on the right side of the law but also contribute to the overall safety and identification of your vehicle on the road. Don't let a simple number plate issue be the reason for failing your MOT – stay informed and stay compliant!
If you want to read more articles similar to MOT Number Plate Rules, you can visit the Automotive category.
