Very common and often seen in June to July early in the morning fluttering weakly over heather moorland. Heather (Calluna vulgaris) and other moorland species are the larval food-plants.

References: 
Leverton, R. & Cubitt, M. (2024). The Larger Moths of Scotland.
Waring, P. & Townsend, M. (2018 third edition). Field Guide to the Moths of Great Britain and Ireland.