Salman Abedi, Khalid Masood, and Khuram each speak to the necessity of implementing the Prevention of Terrorism Act when a person exhibits radical Islamic tendencies.

Abedi was filmed worshipping a large black Daesh flag in Regent's Park and like Masood and Khuram was known to spout radical Islamic propaganda and attend services at radical Islamic mosques.

When persons behave like this, then they need to be taken into custody, investigated interrogated intensively;  if there is probable cause, then they need to have a hearing to determine whether or not to jail and/or deport them.

The security services must act forcefully because there is simply not enough manpower to watch closely all of the suspected radical Islamists.  If there are reasonable grounds, as noted above, to suspect that a person has been radicalized then he/she needs to be taken into custody forthwith.  It is not a perfect solution.  But it is the best solution.

Do you have solutions to this problem?

Thanks, Nigel.