Llyn Clywedog is a 615 acre reservoir built on the head waters of the river Severn in the late sixties to supplement the flow on the river and also alleviate flooding in upper Severn valley. Nowadays it is one of if not the premier water in Wales.
Website: http://www.clywedogtroutfishing.co.uk/
Click on the Pro to see which patterns they recommend and their top tips on how to fish them.