Security expert Chris Phillips has warned against British complacency amidst a flurry of terror attacks in continental Europe, saying there are "more than 2000 people in the UK" capable of carrying out similar atrocities.
A priest was killed yesterday when two people targeted a church in the French city of Rouen.
The attackers stormed the church during Mass and slit the throat of Father Jacques Hamel, 84, and taking four other hostages before being shot dead by police.
The terror organisation calling itself Islamic State later claimed responsibility for the attack.
Phillips, a former head of the National Counter Terrorism Security Office, told Julia Hartley-Brewer: "We mustn’t be complacent, we've got over 2000 people in the UK of a similar ilk.
"The legislation never keeps up with the threat. I've known for 10 years that churches and synagogues were likely to be attacked, because that's what's happening around the world.
"How do you lock [terrorists] up? how long do you lock them up for? At some stage they're going to come back out, this is not something that's going to go away.
"The best thing we can do is make sure our communities stick together."
Listen to the full interview to find out more