I have found this fly to be dynamite at Barnsfold;
Flexi White Cat
It is availble in FlysOnline I think, but my connection is really slow so cant find it.
It can be tough fishing (with the weather) but on a good day I always get at least 4 (an im terrible).
The fish there are strong so and so's, one of my favourite places!
Speaking to the locals there, the colors that generally do well - White and Green, and Black and Green.
I tend to start with a 15ft leader, with a flexi cat on the point, and a black / green version about 8ft away from that.
I also tend to start just to right (as you look from the lodge) of that walkway thingie in the right hand lake. Just my preference really, I start there and work right if the wind isn't too hurricaney!
Hope this helps!
(also ask the locals for advice, they often give me free flies to try!)
Phil