"After the recent vote of confidence, I had given my support to you with one last benefit of the doubt," Williams, 37, wrote. "It has now become apparent over recent days, that this is becoming impossible. It is therefore with deep regret that I resign from your Government."
Tory Whip, Pincher, suddenly resigned last week after getting "too drunk" and acting inappropriately toward people. He has been accused of groping two men although these claims have not been substantiated.