Apparently they can crop for 100 years or more so it is a certainty that the vine will outlive the garden room.
From this:
From this:
To this in one summer:
We might make wine one day, but unlikely this year. Unless the weather holds for another 4 or 5 weeks not enough will ripen. And anyway, they taste very nice and we’ll have eaten them before anyone gets round to remembering where the demijohns are stored.