Boris Johnson is a child at heart. Everything he wants has to be bigger and better than anyone else's.
Not only that, but - like a child - he knows he cannot get it without the unconditional cooperation of all the grown-ups. They have to make it happen.
He makes unfeasible promises like a child. He breaks his promises on a daily basis, just like a child. He knows even less about negotiation than his big brother over the pond, so if the grown-ups don't give him the toy, he threatens to run away. The grown-ups know he will be back by teatime and he is never fully out of their sight, but he often tries their patience.
Like Mr Toad, he lurches between one grandiose idea and another. He is beginning to lose his natural ability to inspire enthusiasm and mirth. The cabinet no longer sits at the table together to chant the mantra of the day.
He needs to go away and tidy his room.