Aibu to think in cases of DV the new partner should be informed?

[wtf2018]

I realise it's entirely unenforceable and in practice never going to happen

But I feel like new partners should be made to read a victim impact statement from the previous partner

My abusive ExH has a new partner, who obviously will have been told a very different story and is now moving in with him.

I can't warn her or I would just be crazy unhinged ex. I feel like she's walking into a very unhappy and dangerous situation and myself as a previous victim will carry some guilt when she inevitably ends up scarred at best by exH

If it was rape... pressure is on rape victims to come forward to stop it from happening to other women.

This woman is likely to be abused daily and yet I can't warn her and must carry the guilt when it happens that I can't and I didn't

YANBU
Someone I knew was murdered by a man who had previously been convicted of Gbh on his previous partner. The poor lady had no idea.
Do you know where the new partner lives? I'd be tempered to put a friendly note through the door - I agree she would never trust a note from the ex (and in any case it's probably best not to get involved), but what if the note was anonymous?

@Enidblyton1 I do actually have the address as I have a child by him.

It's tempting but I'm not sure. It could just be seen as meddling whereas something more concrete perhaps supported by DV workers or the police and kept factual might seem less personal and be less likely to reap repercussions if the abuser reads it

Yes, good point. I hadn't thought about possible repercussions to his new partner if he reads the note.
Wish there was an easy solution

This is the kind of thing Clares Law was set up for. But other than that there is no way someone can just be informed of someones past, unfortunately.

This would only work in the minority of cases where a conviction is made.
If that's the case with your situation I would send her a letter with the legal facts on. Or if theres a court order banning contact with your DC I would inform her of this and why.
If its just your word against his then unfortunately he'd probably easily pass it off as 'jealous ex lying' and its probably not worth it.

If your DC still sees him I wouldn't do anything regardless incase he takes it out on them.