Tomatoes For A Polytunnel.
Most Tomatoes will be happy to grow in a poly tunnel because the humid heat a polytunnel creates during the summer is just what a tomato plant loves. Although saying this the larger Spanish varieties of tomato will benefit most from being grown in a polytunnel because the tunnel will extend the season and allow them more time to ripen which is often a problem in the UK.
Remember to add a few other plants such as marigold and cosmos into the tunnel as well to help with the prevention of pests. i.e companion planting.