In message , NY writes
On both my current vehicles, the spare was transferred from my previous vehicle. Because of this stupid fashion for thin tyres, they differ from the rest of the wheels on the car, but have been declared OK.
What seem to have come in in the meantime are these idiotic aluminium nut covers that come with one flimsy plastic "puller" in the boot to get at the real wheel nut.
I am told they are purely decorative and I can take them all off.