There are 2 possibilities with the one you linked to on ebay, it has either been rear ended and a R45 bumper has been used, or it came from the factory that way, which is highly unlikely imo.
Its extreamly likely it cane that way - they are no long available and cant be got hold of - even when NAC unvailed the MG5 at the Bejing motor show these pieces were mising on the display carThere are 2 possibilities with the one you linked to on ebay, it has either been rear ended and a R45 bumper has been used, or it came from the factory that way, which is highly unlikely imo.