Every now and then, an appalling act of male violence against a woman hits the headlines.
Sarah Everard, Sabina Nessa, Julia James, Zara Aleena.
Women murdered by strangers in unprovoked attacks. They shatter families, make us all shudder and occasionally they prompt politicians to act.
But statistically such attacks, mercifully, are relatively rare.
Extreme male violence against women is much more likely to happen in the place they should feel safest: their own homes. And the perpetrators are likely to be a current or former partner.