Small (<1cm) scruffy-looking acrocarp at the base of a sandy bank, leaves 1-2mm, slender and curvy at the end
No interactions present.
Could be one of the Didymodons, a genus I really struggle with. D. fallax, vinealis or insulanus are all possible.
I agree with Tim
Lat/Lng: 51.09912, 0.04058
OS grid ref: TQ429352