Callum Parslow was convicted on 25 October of attempted murder after stabbing an asylum seeker at a hotel in April. It can now be revealed he was jailed in 2018 for targeting 10 women and girls with messages describing sexually motivated murder, torture and rape, and then changed his name after his release.

At the time, the 32-year-old was on bail and awaiting trial for his most recent offences against women, which followed a similar pattern to the abuse he was jailed for in 2018.

Parslow was targeting Mercy Muroki, a policy researcher and former GB News presenter, from multiple accounts under fake names on Facebook, Instagram and X.

Among the messages sent in July and August 2023 were videos of himself performing sexual acts and footage of a black woman being flogged. “The message he sent was about him fantasising that this would ­happen to me,” said Muroki, who has chosen to waive her anonymity.

Speaking to the Observer, Muroki said: “I said to the police: ‘This is clearly a very deranged person who is fixated on the far-right stuff and on me – do I need to be worried that he might escalate it to something in person?’

“They were kind of like: ‘Oh no, don’t worry.’ They said he seems like a bit of a loner, a bit of a saddo. That’s how they characterised him – just a sad person on a computer – whereas actually I feel that the content he had posted demonstrated it was way past some keyboard warrior stuff.”