I've caught plenty of them from Rutland and Grafham on dare I say it a"FLY"...my best being 14lb 14oz..
The best pattern I've got is a Waggie Tube ...basically a Mr Twister Tail (Bass Lure) on a single hook that's threaded onto a foam bodied tube (Silver & Gold Tube"..The whole pattern is about 4" long...fished with a slow roly poly...this way you get vibration and movement which stimulates the fish !
Big Silver and White Boobies also work (about 3-4" long) as do Minkies of about 4".....
Best colour Minkies are Orange with Pearl Litebright Body......Dark Brown With Pearl light Bright Body..
I know the flies aren't to everyones taste but they are very effective.
Cheers Rob