Getty ImagesThe head of the Prevent counter-terrorism scheme, Michael Stewart, has left his role.
It follows a damning review in February that found the scheme "prematurely" closed its case on Southport attacker Axel Rudakubana three years before he went on to murder three children at a Taylor Swift-themed dance class.
Rudakubana was referred to Prevent three times between 2019 and 2021 due to his interest in terrorist attacks and school shootings, but there was no evidence of a fixed ideology or motivation.
The Home Office would not comment when approached by the BBC.
In July last year, Rudakubana stabbed 11 children and two adults, killing nine-year-old Alice da Silva Aguiar, Elsie Dot Stancombe, seven, and six-year-old Bebe King.
He was jailed in January for a minimum of 52 years after admitting the three murders, the attempted murders of the other children and the adults, production of ricin, possession of an al-Qaeda training manual and possession of a knife.
Mr Stewart's departure was first reported by the Times on Friday. He had been in post as Prevent's director for more than four years.
An urgent Prevent learning review, which was published last month, found counter-terrorism officers staffing the scheme had "sufficient information" to escalate Rudakubana's case to the next stage - known as Channel - which would have included enhanced monitoring.
The review also said that while officers at Prevent had shown a "high level of compliance" with policies in place at the time, it criticised the focus on Rudakubana's ideology.
Speaking after the urgent review was published, Security Minister Dan Jarvis MP told the House of Commons: "The review concluded that too much focus was placed on the absence of a distinct ideology, to the detriment of considering the perpetrator's susceptibility, grievances and complex needs."
