the new shell, would have to be 'new'.
if used,then there should have been a chassis number in it,if there is not....why!
either stolen or been taken out so it cannot go back on the road.
As far as i know you cannot 'Q' plate a car in Liverpool anymore.
if you have a car which cannot be traced then it will be crushed.
better to get in touch with the DVLA Jay.