Tavi
I have fished there a good few times. It used to be that 2 lakes (Osprey and little osprey) had bigger fish in them, but now all the lakes have the same stock policy, and if the truth be told, ive seen far far fewer big fish in there since.
That said, it's a lovely place, and Abigail makes you feel extremely welcome the water's fairly clear, but with peat bottoms, the lakes can be tricky to spot deep fish. Smaller flies tend to work best, and i usually keep my efforts to the largest lake, Osprey, where the water's deepest. If I were you, i'd concentrate under the bush at the top end by the aerator. There's ALWAYS a very large fish that appears out of nowhere under that tree, or right down at the far end under the trees, where there is usually a very nice brown or two.
The other lakes are shallower, and IMO not as challenging as osprey, but there's plenty of water to explore, and Abigail usually takes a pasty order when you arrive. Get one, theyre the size of ironing board covers!
Cheers
Alex