Yarrow

I heard on the radio yesterday that there is a lot more hemlock around this year than usual , and that it's easily confused with cow parsley. So ... is this hemlock, cow parsley or something else? Could it be the corkyfruited water dropwort (wonderful name!) that's known to grow in Rodden Meadow? (Not that I would recognise it if I fell over it!)

Edit: None of the above - it's a yarrow.

I still haven't caught up with everyone's journals, and we're away again this weekend ...