This second feature is all about the flow and constriction of rivers – and how management like weirs, canalisation and urbanisation affect wildlife, with a special focus on migratory species - eels and salmon.
It features Dr Bel Deering of Somerset Rivers Authority, artist James Aldridge, angler and scientist Simon Ratsey, Oliver Hill of the Environment Agency, artist Anne Marie Culhane of Tidelines, and Vanessa Becker Hughes of the Somerset Eel Recovery Project.
Intro music by Timothy Johnston.