Ben
I will go out on a limb, and say that 14C for primary is just a bit too cold. That kinda temp COULD put the yeast under more stress than it would be at 18C. Wyeast says it can ferment down to 15C, but I just wouldnt go that far down. next time you use it, try fermenting a little bit warmer, it will bring out some esters more, and maybe hide that yeasty flavour. As far as the beer being really cloudy, the CC SHOULD drop all the yeast out, as well as proteins, but are you making kits, or boiling extract/AG? if you are boiling, are you getting a good hot break, acheiving a good, strong rolling boil, and chilling well (though whether chilling/cold break can help reduce haze is up for argument, and one I am not going into! I have seen plenty of "no chill" beers crystal clear). If you are mashing, are you recirculating enough, to prevent raw starch entering the boil? And what kind of base malt are you using? I know that Maris Otter has its own "anti cold serve" alarm, in the form of a solid chill haze that it throws below about 10C. I always try and serve my english beers at 10-13C. Maybe try leaving a half a glass out at room temp for half an hour, and see if the haze clears as it warms.
Anyway, I would just say that next brew, brew it warmer, then continue on with your secondary and CC as you have been, and if you STILL find it a problem, then write to Wyeast themselves, and detail what you have been doing, and what problems you have been having. It is POSSIBLE (though doubtful) that you have gotten a dodgy pack, and/or they may have some suggestions as to why you are finding a funky flavour in a first gen sample
All the best
Trent