I know only that thy are a red 'wine' grape and not eaters. The year before last (I moved here just before then) they produced a crop but it caught a fungus of some description. It had been sorted, but then next year some builders cut it back to a small stump at an awkward time in their ignorance. So, this year is perhaps the first I can truly investaigate and potnetially use them.
I will let you know as soon as!
I was recently also given cuttings from a white grape vine, again of unknown variety, and have a couple of hardwood cuttings and a few soft so fingers crossed.