Not sure the species interaction shown for the Hypnum-Trentophlia was quite right but this was the only one possible.
With respect to the good folk that are/might have helped you in the likely ID of this moss, I am requesting that you add the tag Bryophyte as this will act as a further aid by virtue of attracting more of those who specialise in mosses and liverworts. Thanks in advance,
An iSpot Project- HELP WITH IDS - UK & Ireland Community - PLANTS
Lat/Lng: 51.961730833333, -0.64842694444444
OS grid ref: SP929301