I'm not for stocking them either,but it's like shutting the gate after the horse has bolted,or maybe the Ribble is the centre of the angling universe,lol...how many years have cats been hooked on the Trent,i've read about it a long,long time ago now,ask anglers on the Coventry canal what they think of zander,in fact they are coming south fast on the Grand Union,Milton Keynes last I heard,the trouble with zander compared to cats however is they are shoal predators which when they spread are like a wave,takes years for them to even out,cats are territorial...