A trout taking a wet fly fished downstream in fast water will often hook itself. The angler feels the tug and the fish is on.
The take of a trout that has just accepted an upstream wet fly or nymph is far more subtle. The best way to detect these invisible takes is to watch the point where the line joins the leader. When a take occurs the line will stop, or be drawn upstream. Then it is time to tighten into the fish.
A small trout snatching at a dry fly in a fast stream needs to be struck very quickly, by flicking back the wrist.
Larger trout in slower, quieter water should be allowed to turn well down with the fly; in fact, it is often advisable to wait until the line starts to move forward. This is particulary important on the majority of stillwaters.
Once the hook is set,the rod tip should be held well up. A small trout dashing around a pool in a moorland stream should prove no problem; the elasticity of the rod tip will absorb its activity until it is ready for the net. Larger trout, however, will have to be given some line, but with a steady strain applied.
You can play the fish on the reel but most fishermen prefer to handle the line as it gives you greater control.
If a trout is heading for snags it can be turned with steady side strain using the rod.
Never attempt to net a trout before it has tired sufficiently to be controlled under the rod tip. Adopt a low profile to avoid unnecessary movement. Draw the fish over the stationary net. Never jab at the fish in an attept to scoop it out.