I've fished this place on and off since its first day. It certainly started well, with a good number of fish coming out of the carp lake, and to a good size (c28lbs). Then the silvers lake was decimated by cormorants, and the carp lake went downhill. I don't know the reason, but nowadays its not a case that the fish have wised up - I just don't think there's much left in there.
Apparently the silvers lake has now been stocked with catfish, so if they up the game with the carp lake, the place could be a nice little venue to go to once again.