I've posted before under a different username about a (very unpleasant and stressful) investigation I've been dealing with at work into some innocuous things I said regarding sex and gender. The investigation has concluded that I should not be disciplined (i.e. it will not proceed to a disciplinary process), though the whole business has had a horrible impact on my mental health. I have been told that I am not allowed to talk to friends or colleagues about what has happened to me, and I feel it's vital that I do, as they have seen the impact on me.
I want to know, what does the law say about an employee's supposed duty of confidentiality, after an investigation has concluded without charge? Can my employer legally require me to keep details of the investigation to myself, even when the investigation is over? I have not been told any confidential information about anyone else at the company (e.g. I don't even know who accused me). I'd really appreciate it if anyone could point me to any applicable law on this matter, because my Googling is only bringing up law in relation to ongoing investigations, or the employer's duty of confidentiality. I can't find anything that answers my specific question.