Worst case: If you get a puncture somewhere where there's no signal, do you fancy walking half a mile or so to get a signal? In the p***ing rain or snow? Do you fancy waiting for an hour for the rescue truck to turn up to tow you to a garage that doesn't have a tyre in your size until after the weekend when you need to be somewhere in a hurry? If the answer to these questions is, "no", then get yourself a spare.
Very good point there. Anyone kno where i can get a spare wheel from that is for the Leon rather than going to the stealers??