Blight - cut out the haulms & burnt off. Two weeks later:
1. Unprotected, the soil was washed away by the very heavy rain & exposed the tubers. So - with hindsight, I might have covered with fleece??
OR
2. Of course, the b----y slugs had had a field day. And, since the crop was only a large barrow load, I might have done better to lift & use as needed for as long as they stayed usable??