I had a productive hour at Ben Rhydding Gravel Pits this morning searching a couple of willow trees for leafmines. I even found a pale brown tortrix moth on the under-surface of a leaf but clumsily failed to pot it.
I think the case-bearer is probably Coleophora lusciniaepennella which is a new species for me.
The contorted mine with larva still present is likely to be Stigmella salicis.
The empty cone formed at the leaf tip could have been made by Caloptilia stigmatella?