OK. If you have a horsebox built and you buy the chassis and it has plate left on the chassis, does this cover the whole horsebox once converted or not?
No. Because you are putting a new/converting the container on to the vehicleand it will have to be re-tested because there will now be different weights on the front and rear axels. You will also have to inform the dvla of the different use of the vehicle i.e private and it's new specifications. i.e colour etc.
Presumably you mean MOT left - in this case yes HOWEVER, you need to check the V5 for the lorry chassis as you MAY need to replate the vehicle completely.
If the chassis was originally registered as a flatbed or beaver tail rather than box van / luton van you may well have to have a body change check (for safety reasons) prior to it being deemed roadworthy - if this is the case, your outstanding MOT is invalid
Just been through this with ours as we swapped body from an old Bedford Chassis to a MAN.
VOSA technical helpdesk were (for once) very helpful and we were ok as V5 for the MAN said Box Van, if it had been registered originally as say a beaver tail then we would have had to be rechecked
No you don't, I've just converted mine and the only thing we had to do was change it to Private HGV - which you want to do as it is cheaper tax I think. When you get it retested you will also need to fill in the Tacho excemption form - which VOSA give you to sign at the time of the test.
We used to have a lorry that had a demountable container - that wasn't retested everytime you took the container off and used it as a drop sided lorry.
If you change the colour you do have to let VOSA know.
No. Because you are putting a new/converting the container on to the vehicleand it will have to be re-tested because there will now be different weights on the front and rear axels.
Going on that logic every lorry should be retested when you put a load in it - or empty it.
VOSA don't care about the container - unless it is dangerous in some way.
If you were altering the chassis (chopping a bit out of it or lengthening) then you would need to get it looked at - but I don't think it is done under the normal annual plate.