right, well firstly whats wrong with taswood, I've only been there for a day session but it seemed like a very nice place and has lakes to cover all difficulties.
stanninghall lakes is one i have been to a few times and its where i managed my fist 20lb carp, not sure if there is any 30's in there thou but diffinatly high 20's it has nice spaced out swims and is around 2-3 acres, its diffinatly not a really hard to lake to fish u just have to find them
another lake is taverham mill, that is a bit harder as it is around 22 acres but is one of the most beautiful lakes i have ever see, i have never caught from there but am hoping to as I'm doing my work experience there for 2 weeks starting monday and hope to get some fishing in if you look at there face book page theres been a lot of fish out including a 30 so it maybe worth a try.