Ujm, it seems that rav jakobovitz heard from the beis din that he can only attend when he was directly asked to under specific circumstances.
Anon – ash provided a source. You just said it; big difference.
Aaq, i disagree. R. Mirvis represents the Jewish community and his actions are not that of a private individual. He is to be held accountable for his public decisions and we are entitled to know the psak he received.