As widely reported, Lamb yesterday confirmed he was to step down after holding the chief executive position since 1997.
He is believed to have felt the time had come to step down amid mounting pressure over the proposed England tour to Zimbabwe, and the recent rejection of plans he put forward to further reform the county game.
Said Lamb: “It is a high intensity role that has demanded my total focus and commitment for a considerable period of time now.
"I still feel that I have plenty to offer, but I think now is the time to stand aside before I risk losing any of my motivation or enthusiasm.
"There are some important tasks to complete over the next four months, including the delivery of a world class ICC Champions Trophy tournament on behalf of the international community in September.
"Then I shall feel ready to move on and let others build on what has been started."
