I first heard of trout trickling when reading Roald Dahl's Danny the Champion of the World. I'm surprised to know it's actually a thing - I thought the author m

I first heard of trout trickling when reading Roald Dahl's Danny the Champion of the World. I'm surprised to know it's actually a thing - I thought the author made it up. Of course, as others mentioned, highly illegal and discouraged in modern times