If original it'll be on drums, so a blown wheel cylinder could account for the oily stuff, actually brake fluid thrown from the wheel.
It's not from drums as have checked them, the oil is actually a separate issue turns out my oil pressure gauge pipe has been leaking oil from engine side .
Yes that can be very messy. I've seen one go after being melted by welding spatter - oil all over the windscreen, like a downed Messerschmitt in Reach for the Skies.
