Turned over a few stones in the bit I have joined and nothing at all but shrimp. No caddis no nymphs just shrimp.Greenlaner is right, it's still a cracking river to fish, its just the trout fishing "isn't as good as it was many years ago".
So don't sell your gear, get down for the trout with Czech Nymphing tackle or heavy weighted nymphs swung deep and across.
I whinged on to an old guy about eight to ten years ago about the scarcity of fish and he pretty much bollocked me. He said I need to get my fly down underneath the parr. The fly life has changed but the big trout are still there in numbers. He fished with 2 or 3 weighted nymphs, as deep as possible and according to him he caught his fair share of trout to 2lb+ every year.
I rarely see a big trout rise these days but they are there. Rarely a year goes by when I don't catch the odd big trout or two while fishing for sea trout or salmon. I guess the old guy was right but tbh my time is so scarce I rarely get chance to spend a day trout fishing these days and test out what he says.
I've heard a couple of theories about the non rising trout...
1 midges dominate due to a combination of silt and pollution. If you get to the river and there are clouds of midges it's too late; the trout are already hiding up digesting their food.
2 more predators means those trout, parr etc in the best and safest lies don't fall foul of febs. It may just be we are fishing for even more wary fish than 30 yrs ago. The fish that 30 years ago we didn't even know existed because we were all busy fishing for the confident risers at the surface..
These two would also explain why we don't see many small fish but they seem to be still there in reasonable numbers.