‘Shocking and sad’: photographer’s project reveals wildlife lost to pollution in Yorkshire’s River Wharfe

Mark Barrow returned to the site of an earlier shoot five years later and found aquatic life devastated by sewage

Five years ago, when Mark Barrow started his project to film along the 65-mile River Wharfe in Yorkshire, he captured footage of majestic shoals of grayling, the fish known as the Lady of the Stream", some 200 or 300 strong.

Recently, Barrow returned to the same spot, near the historic Harewood House on the outskirts of Leeds, to reshoot some video because he wasn't happy with the quality of his earlier attempt.