A good time to plant grape vines?

Hi All.
Simply, is now a good time to plant grape vines in Devon please?
After a bit of research for wine-suitable red, and seedless eating white vines, I'm probably going to plant Boskoop Glory, and Lakemont vines. Before I waste £17 at my local garden centre, is now a good time to plant these varieties please? The specimens on offer didn't look too special but it is getting toward autumn and I'm not familiar with these varieties.
I've had vines all my life so I'm familiar with the generalities.
Thanks,
Andrew.

 

Well, I think its ok to plant now, just think you have missed out on a season of it getting established.
Think the roots might still be moving at the moment.

I planted a "lakemont" this spring and its grown a main shoot of more than 6ft this summer.