Quite honestly I don't have much experience of squatting under a full rear bumper two seater trad, (from 1997). Do they have a lower rear valance?
I'm thinking not. The Over-rider cars and the cars with no bumpers share the rear valance, but the full rear bumper cars carry a number plate backing plate on the bumper with pendant reverse and fog warning lights - so why would there be a closing panel?
Is my theory correct? I need to get this right.