I fished Arnfield near Manchester yesterday for the first time. It was the first time I have fished a C&R trout fishery like that although where I fish on the Ribble most of the trout, graying (and salmon for that matter) are returned.
Unfortunately I won't be returning. There were fish covered in fungus in the margins looking very unhappy, which weren't bothered about the anglers a couple of yards away. I saw a few dead fish as well at the edge of the lake and further out fish were putting their heads out of the water in a very strange way - I can't explain it properly but they kept poking their heads out of the water time after time looking distressed.
I caught 2 fish, both covered in fungus, one of which had 2 leaders wrapped around it. Neither put up any fight and I struggled to revive them - I wasn't sure if they wanted reviving to be honest

After I caught the second one I gave up and went home as it was too depressing.
I don't want to bad-mouth the fishery (hence I didn't put the name in the title) as it seems well run and they have a good set up there, but the stocking and C&R policy of these places has to be questioned if fish are dying like that. As it was my first (and last trip) I'd be interested to know if this is the norm and are other anglers happy to catch fish like this or just turn a blind eye...