A minute white moth which can be found by gently tapping its food-plant, broom (Cytisus scoparius), in late June to July. An earlier search of broom stems in May or June could reveal the tiny silken white pupal cocoons. A scarce species.

References: 
Sterling, P. & Parsons, M. (2023 second edition). Field Guide to the Micro-moths of Great Britain and Ireland.