Blair's Wainscot Sedina buettneri
Wingspan 28-34 mm.
An extremely local resident and occasional migrant. It formerly bred in the Isle of Wight, where it was discovered in 1945, until the habitat was destroyed in 1951.
In 1996 a new population was discovered in Dorset, and subsequently several colonies have been found nearby.
The larvae feed inside the stems of lesser pond-sedge (Carex acutiformis).
The flight period is during September and October.