Taking it to the civil court?
What is the defamatory content?
So they are prosecuting him. He cannot have admitted it then. Otherwise a caution would have been a good deal.
He may well have admitted making the posts but he seems to be saying they are true and so not malicious communication or harassment.
He is perfectly entitled to a trial if he chooses. It does sound as though it could be an unpleasant one with issues of bad character being put to your husband.
It is possible that his former partner will be produced as a witness too.
The reality is that most allegations of domestic abuse are a load of nonsense. They are either current partner's using the police as a medication service or former partners trying to take revenge.
That doesn't mean they won't be considered. They should not. They should be in the family court as the cost of the accuser. Sadly that is not the current policy. If I made policy the police would not even attend at domestics. Sadly I do not.
Can I clarify anything for you?
I think a court probably would not convict him of these offences if there is a doubt over whether the comments are true.
Certainly a truthful statement can't be defamatory.
Yes, you would be perfectly free to do that if what you were saying was accurate.
People are free to tell the truth in the UK as publicly as they like.