Do you have a citation for the implication of what you have said that a director of a UK (by which I _probably_ mean English or Welsh) company is legally obliged to accept collective responsibility for board decisions?
No, for the very simple reason that that is not what I asserted. I did not use the word "legally" so IMHO you have wilfully misrepresented what I said.
A Director and the Board of which he or she is a member is legally required to act in the best interests of the shareholders. (OK; it is not hard to argue about what is and is not in the best interests of the shareholders!) You are asking me to support a statement that I did not make.
Obviously if he does dissent outside board meetings, he is unlikely to endear himself to the existing establishment at Nominet - but I have a funny feeling that "endearing himself to the existing establishment at Nominet" is rather a long way down his list of priorities.
Both statements might well be true, but he must avoid running the risk that the "majority" of this or any other Board of Directors get so pissed off that they seek the removal of the dissenter(s) by way of a vote at an AGM / EGM, which is why I wrote Dissent has to be practised with care...