Forming a large mat on an area which can be a pond or a bog depending on rainfall.
No interactions present.
Found a similar patch this morning in a muddy part of Duxbury Wood.
I've been walking past this everyday and occasionally I've looked at it and wondered what it was. The area is now as dry as it has ever been so I was able to get nearer and have a closer look.
Lat/Lng: 53.7026, -1.9202
OS grid ref: SE053229