Steve Cullen faces some challenging conditions on the Derbyshire Derwent, at the junction with the River Wye. He's got to deal with low water but this is one of the few places where wild rainbows spawn in the UK, so he's got his eyes on a Grand Slam of a brownie, a grayling and a rainbow. He uses nymphing tactics and watercraft, as well as dries to tempt the fish.