A mat of short growing moss growing in damp hilly area.Colour ranges from green to reddish to white (the latter maybe dead and dried out?)
No interactions present.
Sphagnum capillifolium, perhaps?
I suspect S. capillifolium from the colour and a guess at the size. This can be green as well as red if it is shaded. You are right in supposing that the white is dead, or very dried out.
Thank you Tim and Martin for suggesting a possible species and giving extra info.I now regret not having taken a close-up photo.
Lat/Lng: 55.7939, -5.6296
OS grid ref: NR725615