Phil, some people who had the gunk kit as standard fitted the spare as an aftermarket, so it is quite possible that both could be in the boot, without the relevant information we can only guess. PhilSurely wouldn't have a gunk kit with a spare wheel ? Sport brake has a large rubber covered box that houses the compressor for the rear suspension.
I altered mine from gunk kit to spacesaver, it cost me £800 with e-bay parts and JLR discount, it is not a cheap conversion.yes, never thought about that. I hate the gunk stuff and must have a spare even a skinny get you home job