Not a stew pond at all....they fish catch and release so the fish can be wise. They also have a lower stocking policy so you do have to work for your fish. The fish are not monster double figure fish but are superb quality shashta rainbows from Bibury from what I am told (don't quot me on this)
I fished there in January.
Nice setting very pretty. The lodge is also nice and staff very friendly.
The day I fished was hard as a cold wind was blowing and I only managed one fish on a cats whisker nomad (which really is a last resort for me

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The water clarity is good but there is not much in the way of bankside vegetation as it is only a couple of years old. Not sure what insect life is there or what hatches they get so I can't comment much on that but I would bet on buzzers. It is also a single fly fishery so it fishing a buzzer you may need to fish the bung method. I may well give it another try in April so I will let you know how I get on. It definatley has potential from what I can see.
You could also try Bransford if you are in the area. I did a review on this fishery in January's TFF magazine. It has some lovely small water fishing and it very well developed. It can be a little easy sometimes though in the catch and release pool. Not sure where you are based but Watermark and Busyleaze/Lechalde in Gloucestershire are also very good small waters and Farmoor II in Oxfordshire is a very good larger water (although this time of year it tends to fish deep with boobies and sinking lines).