Grimmia decipiens (Great Grimmia), spotted recently by Sharon Pilkington whilst pottering around a Sarsen stone site (Piggledene SSSI near Marlborough). The long hair points are a good indicator, and if you have good enough eyes, you might be able to see that they are coarsely toothed.
You can read more about this species in our Species Finder, at https://www.britishbryologicalsociety.org.uk/learning/species-finder/grimmia-decipiens/
Published: 1 July 2023