I thank the noble Lord, Lord Coaker, for those comments. I would like to associate myself with his remarks thanking our security services for the work that they do.
The noble Lord is quite right to highlight post-release situations regarding individuals who have been convicted of terrorism or terrorism-related offences. Obviously, they continue to pose a threat, as has been proved in those cases noted. Despite ongoing efforts to mitigate the terrorist risk posed by individuals in custody, the majority still require long-term risk management post release.
However, following the Fishmongers’ Hall attack, we established the probation national security division, doubled the number of specialist counterterrorism probation officers, and allowed for more robust and dedicated risk management of these individuals. Furthermore, all terrorist offenders on probation are now subject to electronic monitoring, and in June 2021 we introduced polygraph testing for terrorist offenders, giving us a powerful tool for monitoring behaviour.
HM Prison and Probation Service, the police and other agencies work closely under MAPPA—the Multi Agency Public Protection Arrangements framework—to assess, manage and mitigate the risk posed by individuals at all stages through conviction, custody, release, post sentence and notification requirements. There is much more in there about this, but it is certainly safe to say that the Government are well aware of the risk identified by the noble Lord, and are doing a lot about it.