The ECB’s management board meets today, but with no official process in place for the hiring a replacement, issues around the appointment are likely to be high on the agenda.
Lamb announced he was to quit last month – and leaves the post in September.
CEO since 1987, 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."
