Wilting toms

Last summer i had what i think was tomato wilt.The leaves curld and shriveled and the plants just died away.although this did not happen untill the plants were full of fruit,any ideas where i may have gone wrong or ways of prevention.

 

Hi cos. I think we all had problems with toms last year I think it was just a rubbish year for them. Maybe just carry on as usual with crossed fingers as regards the weather