Thanks StumpyPete. I know of this but in the diagram it looks like a large area for the spare wheel there.
In the car that I have, when I lift the luguage compartment floor I do not have this area to put a spare wheel.
I have a compartment near the boot door for some tools and for the tow bar and behind that towards the seats there is like a shallow storage bucket area.
I guess my question was do I have to replace all these storage areas with some storage are that will take the spare wheel.