There's been a big increase in the number of phone calls received by the UK's anti-terror hotline in the wake of a series of terror attacks in London and Manchester.
The hotline received more than 5,700 calls in June, compared to 750 in January.
Policing analyst and former detective Graham Wettone says information supplied from the public can often be crucial.
IN: "You get..…
OUT: …attack."
DUR: 11seconds
CLIP: http://www.fsnradionews.com/feeds/0817Terrorhotline-Wettone1.mp3