Common in hedgerows and woodland throughout much of the British Isles, but not in northern Scotland. In Hampshire and on the Isle of Wight widespread and common. Wingspan 5-6 mm. Dissection is required to identify the adult moth, unless bred. Larva mines leaves of Hazel and less frequently, Hornbeam, over-wintering as a pupa. Occupied mines can be common when looked for in appropriate habitat in June and July and again between September and November. The mines are described in the following link:
leafmines.co.uk.