Skip navigation

Advice Centre

Mandatory fixing rules

Fixings must not change the registration or make it difficult to read.


Are stick-on / self-adhesive plates legal? For example those stuck directly to the bonnet or bumper?

While the standard for number plates (BS AU 145e) is what is known as “non-prescriptive” (meaning it doesn’t specify the format of the plates exactly), it is generally thought that stick-on plates would fail one or more of the tests required under BS AU 145e so generally they would be illegal. If you are unsure, ask your supplier for a copy of their conformity certificate.

What is the best way of affixing the plates to my car, screw or adhesive?

Adhesive pads are the recommended (but not compulsory) method of fixing plates under BS AU 145e, which became mandatory in September 2021.

The key rule is to ensure that fixings do not obscure or misrepresent the registration number.

Plates can be fixed using screws (see optional fixing guidelines) or adhesive pads.

Using adhesive pads

Adhesive pads are the recommended (informative) method of fixing plates, under the new British Standard BS AU 145e. 

This is so plates remain quick and easy to read by humans and cameras alike.

Did you know?

The recommended standard for adhesive pads is a minimum of 60cm2/kg of load, or in other words, very strongly affixed!