We're in Northern France where the climate is very similar (maybe a bit warmer, but not much) and our vine does really well outside against an East facing wall. The wall heats up with the morning sun and stays warm all day, which probably helps.
Dh bought a little vine last year in a mad moment when he was waiting for me to pick him up and happened to be standing outside a florist. I didn't get round to planting it and it got left in the pot all winter. It looked dead by the spring but I planted it up against the fence on the off-chance and it's fine! Growning beautifully now (very sunny fence) and even has some teeny tiny bunches of grapes on it. I'm assuming they must always die back in the winter? Or was I just lucky and rescued it in time?