The tiny Eriocrania subpurpurella moth is an oak leaf miner with no English common name. It flies early in the year (April/May) by day and night and is native to much of Europe. It has a tousled horse's mane of hair on face and thorax and, under bright light, reflective gold wings. A variation has purple spots on the gold.
The shoulders are lighter and there is a white patch near the "tail". Its larvae make brown blotches on oak leaves.
Wingspan 9-14 mm; UK flight time Apr-May.