In message , Roger Mills
writes
I think you need to find out exactly what it is, and whether or not it
*should* have been left off!

It's almost certainly a rear cross-member that has been replaced by the
stronger tow bar.
Whether it's worth keeping depends on whether the rear bumper had to be
butchered for the towbar to fit. Mine didn't with the particular towbar
fitted here, so I've kept the cross piece in case it increases the value
when I come to sell or in case I suddenly need a piece of strong steel
that size.
--
Bill