Moth

A white moth, probably a very pale form of Idaea aversata (Lepidoptera: Geometridae) a pale Pleuroptya ruralis (Lepidoptera: Crambidae).  Identified by Martin Angel in the comments below.

Photos taken in the field below Chazey Wood, near Caversham, UK, on 2014-08-27.

Comments

[Martin Angel]

Your white moth is a mother of pearl Pleuroptya ruralis a crambid micromoth - its caterpillars feed on nettles and it is oftern disturbed from nettles during the day - it is very common at the moment

[Tristram Brelstaff]

Yes, that looks a much better match.

I saw the faint band near the wing-tip meeting the leading edge at 90 degrees and only thought of I. aversata. The dark spots on the wing near the abdomen did puzzle me a bit but I never thought to search among the Crambidae (and the specimens shown on UK Moths are noticably darker).

Thank you.