welcome topmarque :-)
I was lucky enough to find a braker's yard that had got a water damaged xv in and managed to do a deal on the wheels so I have a full spare set of which one is in the boot as spare wheel.
the problem is that if you empty all the boot out the wheel well is not designed for a full size wheel and tyre so I just put it in the boot.
you loose a lot of space that way but at least I have a spare wheel and not a tin of gunk.
after a couple of weeks it started doing my head in so I had a re-think
I thought as I don't use the boot that often, I would make a false floor, at least that way the wheel would be hid and I would have a flat floor to put things on
kind a works fine for me.