Isis supporters ‘frustrated’ at being stopped from travelling to Syria may attack UK instead, terror police chief warns

“Frustrated” Isis supporters who are prevented from travelling to the group’s territories abroad may launch terror attacks in Britain instead, the head of national counter-terror policing has warned.

Metropolitan Police assistant commissioner Neil Basu said that before last year’s attacks security services believed that fighters returning from abroad presented the biggest threat.

“It wasn’t – the threat was already here – and there are still plenty of aspirant or frustrated travellers who now have nowhere to go,” he told the National Security Summit in London.

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