Unbelievable! I've never seen so many butterflies together. These are a mix of different whites; there's definitely at least one green-veined white in there.
So pretty when they all take off, but not welcome on the allotment for anyone who hasn't netted their brassicas. ..
They are again near the crleriac drinking minerals and water from the damp earth - I don't know what's so special about that part of the plot.