You can display one of the following flags with identifying letters on the left-hand side of the number plate:
The letters, or national identifiers, you can have are:
The number plates on your vehicle must:
The characters must not be removable or reflective. If your number plates were fitted after 1 September 2021, they must also be a single shade of black.
Your number plates can also:
Motorcycles and motor tricycles registered on or after 1 September 2001 must only display a number plate at the rear of the vehicle.
If you ride a motorbike or motor tricycle registered before 1 September 2001 you can also display a number plate at the front, but you do not have to.
Motorcycle and motor tricycle number plate numbers should be on 2 lines.
Your trailer must display the same number plate as the vehicle you’re towing it with. If you’re towing more than one trailer, the number plate must be fixed to the trailer at the back.
If your trailer needs to be registered to go abroad, you need to fix the trailer registration plate to the back, as well as the towing vehicle’s number plate.
Fix the trailer registration plate as far away as possible from the towing vehicle’s number plate.
If you cannot fix the trailer registration plate on the back of your trailer, fix it to both sides instead. Make sure they’re clearly visible.
The characters on a number plate need to be a certain height and size.
The flag must be above the identifier. You cannot have the flag or letters on the number plate margin, and neither can be more than 50 millimetres wide.
If your number plate includes the UK identifier with the Union flag (also known as the Union Jack), you do not need a UK sticker.
However, you will need to display a UK sticker clearly on the rear of your vehicle if your number plate has any of the following:
If you’re in Spain, Cyprus or Malta, you must display a UK sticker no matter what is on your number plate.
If you have a GB sticker, cover or remove it before driving outside the UK.
You do not need a UK sticker or number plate to drive in Ireland.