Tomato plants (Alicante and Gardener's Delight)

Hi - I bought three of each of the above tomato plants.  I've never tried ring culture before but my partner has, with success, and he set them up.  They were all doing fine in the conservatory/greenhouse.  A few days ago, possibly during the very windy weather, two of the plants started to show some leaf curl - leaves that curled downwards rather like claws.  Now most of the leaves are like that although the tomatoes on the vine look fine.  I don't know what's caused this - possibly the wind (they were the closest to a door so perhaps a draught?). No idea.  But would appreciate any comments or suggestions. I hate to throw them but neither do I want to infect other plants. They're still in the same place but I've placed them at the other end of the room away from other plants.  Many thanks  I have photos but not sure how to upload yet, but they may follow!