Watson's club has no black or Jewish members, and a question may be raised as to why he hadn't resigned before.
He added that he was given names of people "identified to me as Jewish members."
A dozen or so other Jewish members quickly followed.
The board will be the first in decades without a Jewish member.
"But if you really want an answer on that you'll have to ask one of the other Jewish members of the team."
So has the club changed its policy, or even cynically taken in one Jewish member?
They came under pressure almost immediately to expel their Jewish members.
The 400-member club has no Jewish or black members.
No other Jewish members of the media were present, said one journalist who was there.
Created in 1908, it was the first sports club exclusively for Jewish members.