Yikes! Sorry to hear about that, Denis. I hope it is not blight. I had my tomatoes wiped out two years ago because of that.
That being said, if you did get a lot of rain like we have been getting here this season, we may all be in for some blight issues.
According to my Rodale’s “Controlling Pests and Diseases”, if the leaves are curled, cupped and blistered, then the possibilities are leaf gall, mosaic or another viral disease, as well as peach leaf curl, herbicide drift or insect pests.
I also read a description in there for verticillium wilt that looks similar. It says that the fungi can stay in the soil for years. The discussion suggests that it can often appear on only a few branches or on part of the plant, usually outer or lower branches. “If you cut the affected stems open, you’ll often see a light brown or yellow discolouration extending upward from the based of the stem.”
It doesn’t look like peach leaf curl: I’ve seen that before. The grey colouring worries me since that it’s some form of blight b/c of the weather. I’m going to be putting lactic acid spray on my tomatoes regularly for this reason. I want to try and muscle out any fungal spores if I can.
Those look like really interesting supports. What are those white clips you are using to support the plants?
Good luck with figuring that out. Hope it isn’t anything serious.