I bought a brand-new Fiesta this May, my first new, new car. It cost me an extra £100 for a proper spare wheel and tyre, although I think I paid less as my nephew works in the Dealership. Its a space-saver tyre but its perfectly suitable for the short time its on the car, before you get the puncture fitted.
Ignore all talk about space savers being dangerous..they aren't.
These kits that are being supplied with a lot of new cars these days, instead of proper spare wheel, are a bloody disgrace. They can and often do completely b*gger up your tyre, thus making you buy a new tyre when a simple puncture would be repairable. I think that it should be made the law that a proper spare wheel is included with all new cars.
Don't be fooled by what people tell you saving space and weight. There exclusions has nothing to do with that and everything to do with saving the manufacturers money.