Wow. Thank you all SO MUCH for your thoughts, support and insights. This is really helpful.
I haven't been back to this thread for a little while because of a lot going on with healing and therapy, but I'm very glad I came back today.
PTSD Sufferer, those links are great and really helpful. I was especially interested in the TUC one today. I came back here - even though I'd rather be working on healing - because of a classic "discussion" with my manager today. I don't want to give away any identifying information but suffice to say that after a lot of aggressive, accusative nonsense he yelled at me to shut up. Hmmm. Time for a chat with the union, methinks. I joined one a few months ago because of the situation and now I'm very glad. I'll listen to their advice about next steps, and I've been tying the advice on your links into that.
I'd also add a link to the Acas guidance [DLMURL]http://www.acas.gov.uk/CHttpHandler.ashx?id=1043&p=0[/DLMURL]
For those in the UK - Acas guidance is like the Highway Code. It isn't the law, but if something happens and you (or your employer) wasn't following it, that will go against them severely.
I'm sure my manager is a narcissist and delusional but he's not a psycopath or sociopath. I agree 100% that there's nothing that can be done with such people and getting out of their range is the only option, and also the only way to "get" to them. I also agree that in some situations staying and trying to tackle things can be extremely damaging and the best thing to do is get well away. I've been in this type of situation in the past, I recognise it and I feel for anyone else who's been through it.
I'm in a different sort of situation. Again, don't want to identify myself but I'm in an unusually strong situation and the team is an unusually strong one too. I'm able to make sure we have lots of communication, misunderstandings can't fester, everyone keeps talking to each other and supporting each other. My manager is actively looking for other jobs anyway. Unfortunately, he's so rubbish it's hard for him to get one, but I have a lot of reasons not to leave my job and I'm willing to sit it out until he goes and good riddance.
The hardest thing for me is that my manager reinvents what happened and believes it himself. I don't know the medical term and presumably he doesn't have a diagnosis, but he thinks about things endlessly in his head, and he doesn't seem to be able to distinguish between things he's thought about doing/things he's rethought and what he actually said or did. I can document things, but he disagrees with the documentation. I'm going to ask my union rep about this.
I want to repeat that there are situations where toughing it out is definitely not the thing and then the only helpful approach is getting away. In my case, it's really tedious and exhausting dealing with him but it isn't traumatising me and I'm not going to let the little toe rag bank his vast salary and get away with acting abusively to me or anyone else.