One obscure nepticulid might have been enough, but I was lucky to stumble into another almost identical moth on Cleeve Common (Gloucestershire VC33) a couple of days ago. I spotted a number of tiny moths flying low to the ground while looking for larvae in Rock Rose. I potted a couple and saw that they looked very like the Windmill Hill moth so I thought I might get a second chance at a dissection photo. They turned out to be a different species from the same family - Trifucula subnitidella - separated from T.cryptella by the lack of a tornal spot and an odd patch of yellow scales on the underside of the fore wing.
This time I did not mess up the dissection!