Hi Maurice. I'm guessing that you are referring to whether your van needs a standard car shaped number plate of a square one?
I'd pay particular attention to where your number plate light/lights are fixed. Generally, Eribas from about the year 2000 onwards have a central recess to accomodate a car shaped number plate and have number plate lights in that area.
However Eribas up to about 2000, have a single number plate light in one or other of the rear light clusters and should therefore have a square number plate fixed to the bracket provided beneath that light.
Regarding nearside or offside, these pre 2000 vans have the brackets on the UK nearside if they've been imported some time after manufacture. Ours is one such van but we've had a square number plate on the UK nearside since the van was manufactured 21 years ago.
Pre 2000 vans made to be imported into the UK normally have the number plate light and square number plate bracket on the UK off side.
Randa