Streatham terror: Authorities expected imminent attack after Sudesh Amman’s violent outbursts in prison, security sources say

‘Many people do change in prison. But that was certainly not the case with Amman,’ security official tells Kim Sengupta

Amman had shown no signs of remorse or reform (Metropolitan Police)

Sudesh Amman was automatically released halfway through his sentence despite his violent threats in prison causing such alarm that he was put under intense surveillance as soon as he was back on the streets, according to security sources.

Not only did the 20-year-old extremist show no signs of remorse or reform, but his aggressive behaviour was also escalating to the extent that it was decided that he may carry out brutal attacks at any time.

No evidence has yet emerged that Amman – who stabbed two people in Streatham, south London, before being shot dead by police on Sunday – was part of a wider conspiracy, and security agencies are not looking for anyone else at present. But they were aware he was a “lone wolf” capable of carrying out acts of extreme violence.