Isis has attempted six mass casualty terrorist attacks in the UK in the last year and will continue to plan more, the head of M15 has warned.
In a speech in London, Andrew Parker said the country’s intelligence services are now engaged in tackling a “three-dimensional threat” – at home, overseas and online – and that the “scale and tempo” of the danger is at a level not seen in his 32-year career.
“More than 750 extremists from this country have travelled to Syria, and the growth in the threat shows no sign of abating,” he said.
Referring to the six thwarted attempts on British soil in the past 12 months, he said: “It may not yet have reached the high water mark and, despite the successes we have had, we can never be confident of stopping everything.”
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