Cool, crystal-clear waters flow over gravelly beds, streaming through white-flowered water-crowfoot and watercress in serene lowland landscapes. Chalk rivers are a particularly lovely type of lowland ...

He added: 'The main sewer burst half a mile away from the farm, and it ran down the hill into the watercress beds. 'They're connected to the river, and it all backed up into 55 per cent of the area.' ...

They are also home to a host of creatures, including the Eurasian otter (lutra lutra), kingfisher, salmon, and white-clawed crayfish, as well as plants such as starworts, watercress ... lot of the ...