Brassica are affected, I don’t know if other vegs are, I’ll ask when I next see him, hopefully today as we’re expecting sunshine at 4pm so I’ll rush to my plot -luckily unaffected at the moment. It sounds like it might be a different problem then.
I read somewhere that this type of problem happened on ‘heavily cultivated land’ My plot was a bit of field that used to flood and I’ve never dug it, marigolds are self-seeding happily so fingers crossed. For sure I’m not planting anythings that comes from anyone’s plot.