Team Sky Press Release.
Sir Bradley Wiggins has been ruled out of selection for the Tour de France due to an ongoing knee condition - http://po.st/BradTour
Very interesting combination of reasons which has been rumoured these last few days. Is it an infection? Is it the knee? Apparently it is the knee, though what exactly hasn't been disclosed.
Either way it's all guns behind Froome with presumably "one leader one purpose one outcome" as the plan.