About your Vehicle

Trailers - Category O

Trailers are classified by their weight when they are carrying a load, which is known as Design Gross Vehicle Weight (DGVW).

Category Description Entry into Service/Registration Requirements Road Worthiness Testing Requirements
O1 Trailers with a maximum mass not exceeding 0.75 tonne e.g. Small car trailers


 

ECWVTA and related national approval schemes will apply to incomplete and complete trailers from 29th October 2012 and for completed trailers from 29th October 2013.


 

 

Not currently subject to roadworthiness testing.

O2 Trailers with a maximum mass exceeding 0.75 tonne but not exceeding 3.5 tonnes e.g. Larger car trailers and most trailer caravans.
O3 Trailers with a maximum mass exceeding 3.5 tonnes but not exceeding 10 tonnes

ECWVTA and related national approval schemes will apply to incomplete and complete trailers from 29th October 2012 and for completed trailers from 29th October 2013. O3 and O4 trailers must be registered with the local authority and licensed. For more information click here 
Tested annually by the Vehicle testing network,VTN
O4 Trailers with a maximum mass exceeding 10 tonnes e.g. Heavy trailers including articulated trailers