Could pollution be the cause of the declining numbers of the rare Arctic charr in their Lake District spawning grounds?

South of Keswick is Borrowdale, possibly the Lake District’s most picturesque valley. Grange is a pretty spot for a walk across fields to the lake or a stroll along the wooded riverside path.

The Lake District is home to many lively market towns and quaint villages dotted between rugged fells and dramatic tarns. Although there are plenty of well-known spots with great accommodation ...