From the sentencing
*Secondly, although he has no previous convictions for sexual offences or crimes of serious violence, the prosecution relies on records of his previous aggressive behaviour as an aggravating feature. The evidence is of four specific incidents since 2009 and a large number of incidents of aggression in prison. I ignore the earliest incident referred to by the prosecution.
In 2010 his partner alleged domestic violence. She told the police that he had assaulted her, pushed her down the steps, pulled her hair and strangled her. She bore visible injuries. He was arrested and gave an account to the police largely in line with what she had said but he excused himself because she had been “going on” and, as a result, he lost his temper.
Between May 2018 and June 2019 he abused another woman with whom he was in a relationship, soon after it began. He would slap her, punch her, beat her up, kick her in the ribs and drag her along the road*
I would say the only reason he doesn't have previous convictions for aggression towards women is because of the rubbish response by the police and the justice system to aggression towards women and domestic violence generally.
It's hardly a suprise looking at his history that he has escalated to murder. On top of his history of domestic violence there were numerous violent incidents when he was in prison.