Okay so after looking I have instead done a video roll across.
It looks solid still and seems to just be surface rust to me.
Meaning it will fall off with the brush and could possibly be rust cured then painted for a short term repair.
You may also see I shown that the engine has a small oil leak I have not been able to locate this yet and it was already known.
But when I wiped it away from that area last time it did not return so may be high up.
One thing I do know is its stood on a drive and I have had no issue with patches on the floor not even one drip.
Back with the lower crossmember tho when I tap and scrape it it still has plenty of what feels like solid metal left on the middle section obviously not able to test that at the very ends without removing parts.
Rust on crossmember
The part looks to be the original.
Have given it a light brush by hand it does still feel solid from one end to the other. Clearing it all will have to wait for another day with the wire drill brush.
What I did notice was bolts just inwards from the point of ends on the lower bumper grill maybe these are the fixing points as they are large bolts.
The rear plate light looks great as this is an original part the other was an aftermarket.
My other task is to check or have the fluid level checked on the coolant.