London Bridge terrorist Usman Khan was upgraded to a “high risk” category A prisoner after making threats to senior prison staff, The Telegraph can reveal.
Prison officials increased the convicted terrorist’s threat level in prison from “standard risk” after he breached security and put staff in danger.
Only the most serious offenders have such a classification, requiring a constant watch and armed police escort when moved from prison.
Prison sources claim it was one of a number of incidents including violence early on during the eight years he served for a terror plot to blow up the London stock exchange.
He remained “high risk” until released on licence from Woodhill high security jail last December into the hands of probation and police who were responsible for supervising him in the community.
The disclosure challenges suggestions he was consistently a model prisoner who had reformed his beliefs, ultimately resulting in him being allowed to go unescorted to a prisoner rehabilitation conference at London Bridge where he stabbed to death two Cambridge University graduates.
It also raises further questions about the system that allowed him to be automatically released halfway through his 16-year sentence without any assessment of his threat to the public by the parole board.
A Government source said: “There was some concern at the start over his behaviour. Threats were made and he was moved to high risk category A. He was on that to the end. For the vast majority of his sentence, particularly towards th