Three tomatoes from the polytunnel have ripened! As long as there aren't any shock frosts I should be seeing a nice harvest this year.
One failure to note: I tried putting some plants into pots so I could bring them inside at the end of the season but the pots are too small and the plants aren't doing well. Some dry out too quickly and cause moisture fluctuations (blossom end rot) and others just don't provide enough root space. I may try again next year but will use much larger containers.