Gromit, //This tragedy was on the Tories watch, and they are wholly to blame.//
Wholly only insofar as they failed to reassess stupidly liberal laws brought in by the previous Labour governments.
//2003 - The Criminal Justice Act meant most offenders would be automatically released halfway through sentences, but the most "dangerous" would have their cases looked at by a Parole Board. Sentences with no fixed end point, called Imprisonment for Public Protection (IPP), were also introduced.
2008 - Criminal Justice and Immigration Act removed review process by Parole Boards, meaning more offenders were released automatically halfway through sentences. Judges could still hand down life sentences or IPPs for dangerous offenders.//
https://www.bbc.co.uk/news/uk-50618744
Hopefully Boris will address that at a matter of urgency. Vote Boris, Gromit. ;o