This is the procedure for the double-spey cast (off the right shoulder):

• Our starting position is on the dangle and it is our intention to cast (up to) 90 degrees across the river (you can do more but there are better ways of achieving this)

• We will say that, for this example; we are right-handed, we are on the true right bank (looking across the river it is flowing left to right) and there is a down-stream wind (remember we want to keep the fly downwind)

• Move your feet: stand facing square-on to the direction you want to finish the cast and rotate from the waist: so that your shoulders are square-on to the downstream direction (this is the best way to learn - once you know what you're doing you can hang out of trees, hop on one leg and generally break all the rules)

• Lift the rod as you would in an overhead cast

• Then, without stopping, take the tip of the rod around to the left side of the body, turning from the waist as you do, so that the rod is pointed almost directly upstream and the tip is about a foot from the surface. We want the fly to remain downstream, ideally just downstream of the direction we want to cast (if we cast upstream too hard and the fly lands upstream of our intended direction, all we do is let the current carry it downstream a little bit. If on the otherhand we do not get the fly close enough to our intended direction, we are going to loose too much energy on the forward cast, and so we have to roll the line back downsteam and start again)

• Now we want to switch the line which we have taken upstream around to our right shoulder and put it into a D-loop. So we sweep our rod back downstream and up into our roll casting position. This rod movement we use is often called a half-moon dip. We lift the tip, dip the tip, and lift the tip up into a sweeping movement. The line will follow this movement and end up in a large D-loop off our right shoulder

We are now in our traditional roll casting position... you know the rest!