This is a tentative id and should be referenced with some degree of caution

Iken Cliff, Suffolk, 25 June 2015

Ex pupa. Rickmansworth, Herts. Emerged 16 vi 2019.

Wyre Forest, Shropshire, July 2018. Finder, George Tordoff , photo Mike Williams.

Showing approximately triangular cross-section. Under loose bark. Rickmansworth, Herts. 07 vi 2019. Adult reared, emerged 16 vi 2019.

Showing included insect parts and cobwebs. Under loose bark. Rickmansworth, Herts. 07 vi 2019.