20,000 “subjects of interest” posing “residual risk” plus 3,000 judged to be a threat and currently under investigation or active monitoring. That’s the most recent piece of information given by UK’s security services.
Authorities had previously reported to the public a figure of 3,000.
The new information was released following the Manchester bombing, which security services said they were expecting and were just not able to prevent becauseĀ “you can’t stop them all.”