Seriously, Churchill worked very hard to have a firm grasp of the overall situation and to make suggestions or explore new ideas. He sought out advice from people whose judgment he valued, like Smuts.
Every night after a big dinner he would withdraw to his room with his personal secretary and two corresponding secretaries, his dispatch box with the day's correspondence - and a bottle of brandy. He kept them going with dictation until the wee hours of the morning until he had addressed everything in the box. He even followed the drill when staying at the White House. I don't know how he did it.
The thing going through my mind was no one but Churchill seemed to be responsible for the War. One would think that there would be someone like Marshall or King or Hulsey who could be responsible on the British side.