UK Number Plates Explained: Structure, Regulations, and Impact on MOTs

Number plates are a fundamental part of vehicle identification in the UK. They follow a specific structure, must meet legal regulations, and can impact your MOT test results. Here’s everything you need to know about UK number plates.

Number Plates Structure

The structure of UK number plates follows a specific format introduced in 2001. Each plate consists of:

Two letters indicating the region where the car was first registered.
Two digits representing the vehicle’s registration year.
Three random letters unique to the vehicle.

For example, a plate reading AB23 CDE means that ‘AB’ represents the region, ‘23’ indicates the car was registered between March and August 2023, and ‘CDE’ is a randomly assigned sequence ensuring uniqueness.

Number Plates Compliance

To comply with legal requirements, number plates must:

Use a standard font and size, specifically the Charles Wright font.
Be reflective, with black characters on a white background for the front plate and a yellow background for the rear plate.
Be made from approved materials and display the British Standard mark.
Include the supplier’s details and the BS AU 145e standard reference.
Display a UK identifier if the vehicle is driven abroad.

During an MOT test, the examiner will check number plates for:

Legibility – characters must be clear and unaltered.

Condition – cracked, faded, or excessively dirty plates can lead to an advisory or failure.

Compliance – incorrect fonts, spacing, or missing details can result in a failed test.

Understanding UK number plates is essential for ensuring compliance and passing an MOT test. If you’re unsure about your plate’s condition or legality, check it before your MOT to avoid unnecessary failures.

Key points

Key points to remember about UK number plates:

They follow a specific format with two letters for the region, two digits for the registration year, and three random letters for uniqueness.

They must adhere to strict legal requirements, including font style, reflectivity, and material standards.

Plates in poor condition or non-compliant with regulations can result in MOT failure.

Ensuring your plate meets UK legal standards helps maintain compliance and avoid penalties.

Save on MOTs and Services with Rooster

Rooster not only helps you save up to 40% on car insurance but also provides up to 50% discounts on MOTs, servicing, and repairs. Download the Rooster app today to check your MOT history, book a service, and manage all your vehicle needs effortlessly.