Float fishing on moving water is a style that many anglers struggle to cope with.
Get it wrong and you'll end up catching very little, but do it right and it's one of the most rewarding forms of fishing there is.
Dave Harrell has won hundreds of river competitions on the float, and in this DVD, the first one of a new series on rivers around the UK, he reveals some of the secrets that have made him so successful.
We set Dave a challenge on a swim he has never seen before, on the River Severn at Seed Green, in Worcestershire.
How will he cope, and will he choose the right approach for the five hours that are available to him?