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Number plate law

What the law actually requires of a number plate, and what it does not. Every answer here comes back to the same test: the finished plate has to meet the British Standard, BS AU 145e, and be displayed the way the rules on GOV.UK require.

A 3mm 4D number plate, on an angle to show letter depth
Are 3D and 4D Number Plates Legal? The Complete Guide to ANPR, Infrared and BS AU 145e

3D and 4D number plates are legal in the UK when made to BS AU 145e. Here is exactly what the law requires, how ANPR cameras actually read a plate, and what genuinely makes a plate illegal.

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A UK vehicle abroad with a new trailer number plate
New UK Trailer Registration Plates Explained (2026 Guide)

New UK trailer registration plates explained. Find out when you need one, what they look like, and order a DVLA-compliant trailer plate for travel abroad.

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A shortened printed number plate by Utopia Plates
Shortened number plates: legal sizes and rules

Shortened number plates are road legal as long as the margins are right. Here are the rules, the sizes we cut to, and how to order a custom size.

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Surveillance cameras mounted on a pole
Can ULEZ & Parking Enforcement Cameras Read 4D Number Plates?

Can ULEZ & parking cameras read 4D plates? Yes, they can! While these systems may seem unfair, 4D plates won't help you avoid fines or charges.

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Utopia Plates 4D 3mm with Gel number plates, in the hex shape and featuring a border
What are Hex Number Plates and are They Legal?

Yes, hex number plates are road legal in the UK when the finished plate meets BS AU 145e. What the rules say about plate shape, sizes and styles.

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A 3D Gel JDM Plate featuring the text JAPAN IMPORT
Are Import Shape Number Plates Legal in the UK?

Import shape number plates are legal only on an imported vehicle that cannot take a standard plate. What regulation 14A requires, and the sizes it sets.

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A pair of 4D Gel number plates from Utopia Plates
Why are number plates different colours in the UK?

UK number plates are black on white at the front and black on yellow at the rear. The law, and when black and silver or a green flash is allowed.

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A Green Flash with Union Flag number plate, registration UP14 TES
Why Do Electric Cars Have Green Number Plates?

Why do electric cars have green number plates? The green flash highlights zero-emission vehicles, promoting eco-friendly driving and future incentives.

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A 3D gel motorbike size number plate
What is the text at the bottom of a number plate?

The text at the bottom of a number plate is the supplier name and postcode and the BS AU 145e mark. What each part means, and why a legal plate needs it.

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A Suzuki Jimny
Are tinted plates road legal? The UK rules explained

Tinted number plates are not road legal in the UK. What the GOV.UK rules on number plate display require, and the legal ways to get the look.

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A car show with many Japanese cars with their bonnets open
What are show plates when it comes to number plates?

Discover the world of 'show plates' in our blog post. Show plates are an intriguing aspect of car culture, but they're not road-legal or MOT-compliant.

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A group of Police officers and their vehicles
UK Number Plate Rules: What the Law Allows

What makes a number plate legal in the UK: the British Standard, colours, font and spacing, what is not allowed, and what an illegal plate costs.

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