Here’s another quick-and-dirty fly-casting video that I made with Pete Kutzer of the Orvis Fly Fishing Schools. Previously, Pete demonstrated the Circle Spey cast, which is useful when the current is going from right to left (for a right-handed caster), so your rod is across your body as the line hangs in the current below you.
When the current goes left to right, your rod points away from your body when the line hangs downstream. That’s when you’ll want to try a Double Spey cast. But isn’t that for two-handed rods? you might ask. No; this is a cast that works great with your standard trout rod, as well.
As with the Circle Spey, the key to the Double Spey is repositioning your line so you can make a good roll-cast presentation. By slowly moving your rod tip upward and across your body, you can bring the tip of your line close enough that a roll cast is possible. Try the Double Spey on the lawn a few times, and then give it a shot next time you’re on the river with no room for a back cast.

Thanks Pete!
One of the easiest and most useful casts for the single-hand angler is the Double Spey.There’s no reason to let the two hander intimidate you. It’s just a fly rod and the Spey cast has a lot more in common with the single hand cast.Great tutorial about the basics of fishing with a How to Make a Double Spey Cast with a Single- or Two-Handed Rod https://myfishingrod.com