Sir Ian McKellen to play Sherlock Holmes

He's all over the place these days isn't he, Sherlock Holmes? There's the crap Guy Ritchie version where he takes his shirt off and goes bare knuckle boxing with geezers in slow motion, and there's the utterly excellent BBC version where Benedict Cumberbatch swans about solving crime in a slim-fit blazer and giving the ladies his hard stare, and the frankly baffling Johnny Lee Miller American version where he's all tattooed and trying to get sexy with Lucy Liu as Watson.