– Low-lying wide valleys with open freshwater pools fringed by reeds with edges of grey willow, sallow and elm thickets.
– Formally enclosed with relic early enclosures and evidence for peat cutting surviving as surface features.
– Surrounding fields with network of drainage ditches.
– Of great historic, archaeological and paleao-environmental significance.
– Very high nature conservation value – all are designated Sites of Special Scientific Interest (SSSIs), particularly important for breeding and migrant birds.