Okay, this is a bit annoying but not devastating.
Grey tips/edges on the cabbage (Tundra) leaves, on almost every leaf even the wee ones in the middle. Strangely it is just the very edge of the leaf, never on the main bit. You'd say it was caused by the damp if you saw just one leaf, it but I'm suspicious at the lack of spreading.
I'm thinking something to do with nutrients, possibly a trace element deficiency. Any ideas?
Had the same problem with mine.
Fellow plot holder told me it was calcium deficiency.