Looks like tiny pond weed.
No identification made yet.
No interactions present.
It's a moss of some sort, but I couldn't say which species. Possibly one of the Warnstorfias, but that's little more than a guess
I agree either Drepanocladus or Warnstorfia!
This looks most like Warnstorfia fluitans with its lax form and curved leaves at the shoot tip but to be confident of the ID you probably need to look at the leaf structure under a microscope.
Lat/Lng: 51.3, -3.0
OS grid ref: ST3561