What trust or trustees are you referring to?
I am not sure you understand the question, or the ciircumstances.
This is really a matter of who is the shareholder.
a) You seem to acknowledge that the widow is the beneficial owner which would indicate that there is only one shareholder so there is a quorum of one.
b) You then make the distinction that because she is not the registered propietor of the shares there must be two shareholders and so should be a quorum of two.
c) However because there is only one shareholder who is entitled to vote (either becasue she is the sole shareholder under a) above or because the other shareholder is not entitled to vote because he is dead and without probate there is no executor to excercise any vote on his behalf) then it seems to me that the quorum reverts to one.
d) However you are appearing to say that it does not, but without giving any reasons in law.
e) It is the legal reasoning that I am after. I am not a way around the problem of which there are several, but they each have different complications. I just don't want to incur those added complications unnecessarily which is why I need to be absolutely certain of my legal ground before proceedibg one way or the other.
If you are not able to do so then please just say so and we will end it there. Please don't just guess - I can do that!