Is it just me that's sad enough to be thinking that there's more than one Derwent? (There are four Derwents in England) I suppose that it doesn't matter too much and it's probably going to be the Derwent in Derbyshire anyway.
It's great to see a quality specimen Perch from the Derwent, not many men can say they have had a 3lb river Perch, well done Keno thats a proper fish! Top angling mate.