Phylum: Chlorophyta   Family: Radiococcaceae

Gloeocystis polydermatica (Kützing) Hindák

A colonial species found in large gelatinous masses. Possible widespread in suitable habitat but rarely recorded

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