I have asked the previous Co. Sec. and his wife, who are friendly with the UN to arrange a lunch together, for which I would pay. The UN says that she is not yet ready to meet up, so there is a softening of attitude.
My DH has attempted to arrange two meetings with the current difficult Co. Sec. but her response is "I work." Her predecessor worked much longer hours in a very challenging job and had a long commute. I tried to talk to her once, but I am very bad in a highly charged emotional situation and will say nothing for fear of saying something to upset, and you can never take it back. So as you Gransnetters have probably observed I have plenty to say by email, when thoughts can be considered and reflected upon.
My DH does not wish me to involve the previous Co. Sec., but having asked him to arrange a lunch, he has become somewhat involved, and it transpires there is history about which we were unaware.
As I begin to see it, with the help of some of the Gransnetters people with personality disorders are particularly vulnerable. We can ask her privately to consider standing down, as it seems to be taking up rather more time along with a full time job. We know that none of them will want to pay for an outside agent to manage, but they might accept my DH doing the job, with the Co. Sec. becoming the treasurer, as he doesn't really want to do it, and particularly doesn't want to do the accounts. Then she can save face, and she can go back to just meeting us incidentally and at the AGM, which has always been her choice, as before. There has never been a suggestion of ignoring her. So we can rub along together carefully, like hedgehogs.
If that doesn't work, it'll have to come out at the AGM, and if that doesn't work, we may have to contact a solicitor. Her sister is a solicitor, so we may need to ask her sister to help defuse the situation.
BUT other people in the block need to be aware that there is a problem, so as to avoid pressing her buttons, otherwise we all end up in this miserable situation again.
And thank you Gransnetters, for helping me to arrive at some sort of way of dealing with our situation.