Found this very striking
Entoloma in unimproved calcareous grassland near Malham Tarn. Cap c35mm diameter, spores 5-6 angled almost isodiametric 6.7-8.1µ x 6.9-7.6µ. Pileipellis had a layer of very thin hyphae overlying a layer of wider hyphae; hyphae had clamps. No cheilocystidia or pleurocytidia were seen.
I tentatively identified it as
Entoloma bloxamii - does this like a reasonable attempt?
Spores:
Pileipellis (sorry about poor photo)
Any help, ideas or gentle nudges much appreciated as always.