I think it's a sop. I don't doubt that the family of Clare Wood genuinely believe that promoting this kind of access to information will genuinely help, but I agree it's unlikely to have any genuine impact on women's safety or welfare.
I think it's a sop so the Government can "look" like they are doing something big and important to protect women and tackle violent men. It will be cheap as chips because the onus will be on individual women to access the information and they know that most probably won't bother. We already know most abuse is not reported to authorities, so a "clean" report could give a false sense of security, or make a woman doubt her instinct if she starts to get niggling feelings something isn't right.
And, of course, even if a man hasn't been abusive in previous relationships, it's no indication that he might not become abusive in a new one.
Nope, I don't think it will make a whit of difference to women's safety or in any way serve as a deterrent for men who seek to abuse women.
What is needed is genuine, consistent messages that domestic abuse is not tolerable, starting from the first years of primary school, through high school, outside school in youth and community work, through women's safety being upheld in law and appropriate sanctions/punishment for those who violate it, by having sufficient, safe spaces for women and their children to go but also the genuine legal power to make an abusive man leave the home, and leave the woman alone. It's a combination of practical steps and support and major culture change. I'm not the least bit confident that we'll get either in the short term. All the indications are that both are moving swiftly backwards.