He said: "I worked with Harry Redknapp and he is good for this job. I don't know so well the others but for me, Harry is the best English manager.
"He is a very open guy, he understands football, he has a good relationship with players and he knows in his special way how to get the best out of the players."
And Grant is in no doubt the next manager he worked alongside, Jose Mourinho, is also a good candidate.
"Yes, he can do a job for England, I am sure about this. He is an organised person, the game is organised with him and England need that."