Tomatoes and runner beans

I always start tomato seedlings on a south facing windowsill in March, and they spend sunny hours outside to harden off before being planted out in their growbags. This year they had a big setback when a huge hail storm nearly wiped them out completely. But they somehow survived and are now doing well.

My runner beans fared a bit better. That is, until I planted them out in their container: every morning I find that "the invisible worm that flies in the night" has found out their bed (with apologies to William Blake). Big holes are appearing in the leaves; and worse, some of them are cut through the stem at ground level!