See previous thread on this one
carsington water
Ask the rangers where the fish are, they are usually spot on. Fuish will be quite close in so work parallel to the banks, or dirfts into bays and onto the shore.
Don't just anchor up somewhere, fish on the drift until you find fish, then you can anchor or drift again.
Montana is my favorite fly, but claret dabblers and bibios work well as do buzzers and diawl bachs. I would think that a floating line would be best bet, but also tackle up with a sinking line with small lures (cats whisker, black lure and blobs) will do the business.
Keep seeking and you shall find.
It's a great water and you will want to go back again and again.
Let me know how you get on.
Iain