Not recently but I used to fish the lower lake on a regular basis until the National (Mis)Trust netted it and sold the fish to another club whilst still taking the day ticket money!
I wouldn't like to say one way or the other, it may well have been fishing well again recently but then you never know when the same thing might happen again.
Lovely place though, very shallow on the bottom lake with the old course of the river bed the place to look for if you're after any bigger fish that might still be in there... The only thing that ever put me off (apart from having the fish removed) was the constant drone of traffic on the nearby M1.
I can't wait until HS2 is adding to that
mg: