In the UK you only get the left hand side net with folding rear seat. I had the net on my E60, and do not miss it on my F10 as it held so little
Inside the boot (trunk) lid we have a screwdriver , tow hook, locking wheel nut, first aid pouch and warning triangle. At the right of the boot I have a deep plastic box, handy for bottles, deep enough for a 2 litre Coke bottle. The little door above this is the rear fuse box cover. The underfloor space is taken up by the massive battery so no space for the spare just a 10-15 litre storage area. Good job we have no spare wheel.
If you want the small side net you need the full side panel which will cost a lot unless you can get one from a breakers.