Trailers with a maximum mass exceeding, 3,500kgs must be tested 1 year after they were first sold or supplied and every year after.
Trailers that are subject to type approval in the UK (see below) must be fitted with UK trailer identification (ID) number before entering service. The manufacturer or ‘final supplier’ is required to obtain a Consent to Supply authorisation, which includes a trailer ID number, from Vehicle Operator & Services Agency (VOSA) before supplying these trailers to the operator.
The UK trailer ID scheme has been introduced as a practical means of controlling entry into service requirements. VOSA are responsible for administering the trailer ID scheme in the UK. Trailers will fail the annual roadworthiness test if presented without the UK ID number fitted to the trailer, or a chassis plate attached securely to the trailer.
Trailers manufactured before 29 October 2012 will continue to be issued with an NI identification number at the time of booking the trailer’s first annual test.
Heavy trailers (primarily those with a maximum mass exceeding 3500kg) manufactured from 29 October 2012 are required to be constructed in compliance with European or National type approval requirements, if built in Single Stage.
A trailer constructed in single stage has been built and finished in one stage, by one manufacturer.
Heavy trailers manufactured from 29 October 2013 are required to be constructed in compliance with European or National type approval requirements, if built in multiple stages.
A trailer constructed in multiple stages has been built and finished in more than one stage, normally by two or more different manufacturers. For example a tipping trailer, where a second manufacturer has finished the vehicle by adding the additional components (ie. the tipping body).
How can I apply for an annual test?
Applications for a trailer (for first time tests only) can be made by completing an application form and posting it to a Driver & Vehicle Agency (DVA) test centre or by calling in person to any DVA test centre. You also have the option of online (not for first time test) booking service or the telephone booking line.
When using the online booking service or the telephone booking line to book an annual test for trailer, you will be provided with a booking reference number only. You will then have to contact your selected test centre to obtain your test date and time. An appointment letter will be issued when the booking has been confirmed with the test centre.
If you require further information you can contact DVA Enquiries team on 0845 601 4094.