March 2026 change as drivers alerted to 'rules'

The latest batch of number plates hit the roads on March 1 and certain banned combinations have been deemed unsuitable for British roads. But it's not just dodgy character sequences that can land your registration in hot water.

James Harding, a tyre specialist at Blackcircles boasting over 16 years' experience in the motor trade, explained: "In recent years, the demand for customised number plates has grown, with Google searches for 4D number plates increasing by 101% over the past quarter and over 28k searches for the term 'personalised number plate' in the UK over the past month.

"While personalising your number plate might seem appealing, Britain's registration laws are remarkably stringent, and non-compliance could land you with a penalty of up to £1,000, an MOT failure, voided insurance, and police authority to remove your vehicle from the highway until the plates are rectified. To prevent motorists being caught off guard, we've outlined the various ways your plate can become invalid."

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Seven factors that render your number plate unlawful Coloured plates

UK vehicles must display white plates at the front and yellow at the back, both featuring black lettering. Any alternative colours are prohibited and will render your plate illegal.

Wrong font or spacing

The UK maintains strict regulations concerning spacing and typefaces. Every number and letter must appear in Charles Wright font, measuring 79mm in height and 50mm in width (with the exception of '1' or 'I'), 14mm in thickness, with an 11mm space between each character and a 33mm gap separating the age identifier from the final three letters.

Tampering with spacing or employing bespoke fonts renders the number plate invalid.

Flags

According to the DVLA, only certain flags are permitted on the left-hand side of number plates. These comprise the Union Flag, Scottish Saltire, Cross of St George, or Welsh Dragon.

Should your number plate feature alternative flags or emblems, police have the authority to prohibit your vehicle from the road until the matter is rectified.

Illuminated plates

Whilst a white light for illuminating your vehicle's rear plate is acceptable, any alternative form of lighting is prohibited. Never employ coloured lights to illuminate either the front or rear plate, and bear in mind that emphasising letters or numbers on your plate in any manner will render it invalid.

Tints

Number plates are required to satisfy the minimum reflective standard established by the DVLA.

Consequently, tinted number plates are prohibited for road use as they can hinder police and motoring systems from identifying the vehicle.

Dirty number plates

Driving with dirty number plates constitutes an offence.

Plates must remain visible to police and any automated motoring systems at all times. Ensure you routinely clean both front and rear plates to prevent incurring a fine.

Meddled plates

In the UK, it's not allowed to use materials to change the characters on your plate or rearrange them to form a different sequence. Number plates serve as a vehicle identifier, so tampering with the original letters or numbers is against the law.

James advised: "If you are worried about your number plate's legality, you can have it checked by a trusted number plate supplier or the DVLA.

"If it doesn't comply with regulations, replace it immediately to avoid potential fines or legal action."