Excerpt:
The NHS referred 420 patients and staff to police in England and Wales in a year over concerns they were at risk of radicalisation, the BBC has learned.
National Police Chiefs' Council (NPCC) figures show an average of 35 referrals a month in the year to July 2016 - up from 21 a month the previous year.
Since July 2015, public bodies have a legal duty to report people considered at risk of being drawn into terrorism.
The government says its Prevent programme safeguards people at risk.