Marsh Pug Eupithecia pygmaeata

Marsh Pug moth
Marsh Pug
Marsh Pug
Small, very flighty, day-flying moth on stitchwort in long grass. Wingspan 14-18mm; UK flight time May-Jun.

The Marsh Pug is nationally uncommon and is said to be found in isolated locations in central and northern England and in Scotland and Northern Ireland, but these were flying in Totteridge Fields, north-west London.

Many thanks to John Bryan for ID.