Two parasitoids emerged from the lichen-feeding larvae (4/4/11 & 8/5/11).
Mark Shaw kindly identified the parasitoids as Diadegma sp. (Ichneumonidae: Campopleginae).
Klaus Horstmann has described Diadegma narcyiae from an example in the Netherlands in 2008. There is already a suspected British specimen (Hampshire) but it is a male and so very uncertain.
My two Wharfedale specimens (also both male) are now also with Horstmann and, hopefully will be positively identified soon.
In 2012, Klaus Horstmann corrected the original incorrect spelling to Diadegma naryciae (justified emendation).