Day-flying moths. They look amazing in flight.
There were dozens of them in the area behind the windmill
Common Ragwort (Senecio jacobaea), were covered with the same type of caterpillars.
They look like the larvae of the Cinnabar Moth (Tyria jacobaeae), which will be
one to look out for later in the year.
Senecio means an old man, and refers to the grey hairy seed pappus. I believe
that the jacobaea part refers to St James, but I have no idea why!
a male Large Skipper butterfly (Ochlodes venatus)
female of the same species, on the basis of photos in my insect books.