When four navigational weirs were built on the Severn in the 1840s they blocked the route of shoals of twaite shad as they made their way upriver. Now, a newly built system of fish passes means they can come home to breed.
When four navigational weirs were built on the Severn in the 1840s they blocked the route of shoals of twaite shad as they made their way upriver. Now, a newly built system of fish passes means they can come home to breed.