Cats Whisker 

This first appeared in the 80s when David Train used the moulted whiskers from his cat to stop the tail from wraping round the hook, and the rest as they say is history, this fly is probably the most sucessful lure for the stillwater angler, can be fished year round on any line and any retrieve you like and it just catches fish, the original has also spawned a host of variants some sucessful some not.