VIN numbers!
To answer all the recent questions on preparing a trailer for testing, one of the most essential elements is the Vin number, so to clarify.
The VIN ( vehicle identification number) is a 17 digit coded set of figures that gives the history of the trailer and must be stamped into the frame of the trailer as well as on the makers plate. It is also worth checking that the coupling height is correct when fully laden it must be between 395-465mm above the ground when horizontal.