distorted tomato leaves

Hi,

This is the first time I have grown tomatoes in a green house and I am not sure if there is something wrong with one of my plants. All the bottom leaves have curled inwards (which from reading other threads is normal) but the new shoots are thick, all curled up and twisted in on themselves.

I persevered with the plant but all new shoots are the same (also some fruit at bottom of the plant have not got bigger than match head - not sure if this is related). My other plants are seed raised by myself but I bought this one from a garden centre. I hope it is not something that will affect the other plants? I have bought some shading as it was getting quite hot in the greenhouse but non of the other plants seem affected and are growing well. Any ideas?