If you've got access to not only your boot, but a plentiful supply of 19" wheels with tyres fitted at each corner of your car.
Why not take one off and see if it fits in the boot?
That way you can be 100% sure either way and if you can live with any compromises (boot floor in higher position constantly?) that might occour.
Laziness springs to mind!!!!
Was just wondering whether anyone else had done this before I try, will have an update at the end of the week
Now I have my wheel back, from JP Alloys at Cannock, what a job they did, you wouldn't even know that it had been kernes before, sorry no photos, was too ashamed to show the damage beforehand, just like too say that the 19" wheel didn't fit the space in the boot, it might of done if you wanted to make some adjustments to the plastic in the boot space(I.e. Cutting it out)