Phylum: Chlorophyta   Family: Radiococcaceae

Radiococcus polycoccus  (Korshikov) Kostikov, Darienko, Lukesová & L. Hoffmann

This has undergone a number of name-changes in recent times. Thought to be widespread in shallow pools and loch-margins

References: 
John, D.M., Whitton, B.A. & Brook, A.J. (2011 second edition) The Freshwater Algal Flora of the British Isles