Right, and it specifically states that on your insurance certificate does it?
On my certificate it states some letters that my policy includes then in the handbook it states what the letters corronspond to, one of them being DOC cover.
I was surprised as I didn't actually specifically ask for it and I may be reading it wrong but I did ring up saying I wanted pretty much everthing included eg; legal cover, hire car, breakdown etc. I've also got £0 excess after the obligatory excess or w/e.
It was quite a bit more expensive than the cheapest quote but I'm only paying half and it was paid off for the full year which is obviously cheaper again.
Only thing they wouldn't do because of my age was cover any modifications I think until I'm 25.
I won't ever need to drive another car which is why I haven't bothered phoning and at least I have my own policy unlike a lot of people my age I know who seem to pay a 1/3rd I do because their on one of their parents policy despite them always driving the car.