Britain has not yet been hit in the recent spate of terror attacks across Europe, but it may just be a matter of time before the country's defences are breached.
After incidents such as the 'lone wolf' truck-attack in Nice, which killed 84 people, to the shopping-centre shooter in Munich who gunned down nine members of the public, concerns are rising about a potential attack in the United Kingdom.
Former Metropolitan Police officer Chris Hobbs reassured the British public that it is more than luck that is keeping them safe, but admitted that it is impossible to count out future attacks.
"I suspect it's more the security services are quite good at what they do," he told Jonny and Ash. "So we've managed to stop terrorist attacks to date – the French and the Germans haven't.
"But of course, everyone acknowledges sooner or later something bad is going to happen.
"One lapse in concentration and you could be punished for it. You have to put as many hurdles in their way as possible."
Listen to the full interview above